Category Archives: media

Entrevista con “El Economista.es”

http://www.emmetfletcher.com/wp-content/uploads/2014/02/cropped-cropped-photo_1688637908_o11.jpg

Con la llegada del objeto misterioso el viernes 13 de noviembre, stuff
habia bastante interés por parte de los medios de comunicación.

El Economista.es

Entrevista con EFE sobre la basura espacial

Articulo Originál: http://www.efefuturo.com/noticia/indico-objeto-basura-espacial/

Mañana caerá en el Índico el objeto WT1190F

[caption id="" align="alignleft" width="650"]<p>Los tamaños y distribución de la basura espacial (20.000 / 600.000 / 35.000.000). ESA</p> (I’m really going to have to update this image one of these days)[/caption]

EFEFUTURO.- Mañana está prevista la caída de un “raro objeto”, story previsiblemente un resto de cohete espacial, en el océano Índico, a unos 100 kilómetros de la costa sur de Sri Lanka.

Se trata de un objeto “bastante pequeño, a lo sumo un par de metros”, bautizado como WT1190F y descubierto en 2013 por “Catalina Sky Survey”, un programa operado por el Laboratorio Lunar y Planetario de la Universidad de Arizona que utiliza datos de tres telescopios para buscar cometas, asteroides y objetos próximos a la Tierra.

Según la web de la Agencia Espacial Europea (ESA), la previsión es que el “raro” deshecho reingrese en la atmósfera terrestre alrededor de las 07:19 horas (06:19 GMT) del 13 de noviembre.

“El objeto es bastante pequeño, a lo sumo un par de metros de diámetro, y se espera que una fracción significativa, si no todo, se pueda quemar por completo en la atmósfera“, afirma Tim Flohrer, de la Oficina de Basura Espacial de la ESA en Darmstadt (Alemania).
Sin peligro

Lo que quede, según la ESA, se espera que caiga en el mar a unos 100 kilómetros de la costa sur de Sri Lanka: su masa no es suficiente para causar riesgos.

En cuanto a lo que es, la ESA dice que es un objeto “bastante especial” ya que probablemente está hecho por el hombre.

En este sentido, Emmet Fletcher, portavoz de la ESA en España, ha explicado a Efe que de lo que sí están bastantes seguros es que no se trata de un asteroide, quizás sea un resto de una misión lunar.

Emmet, quien ha insistido en que no hay peligro, ha recordado que en el espacio orbitan más de 600.000 objetos de basura espacial de entre uno y diez centímetros (20.000 son más grandes de diez centímetros).

Se espera que los telescopios instalados en Puertollano (Ciudad Real) sean los primeros en dar datos precisos de este objeto.

Según la web de la ESA, WT1190F ofrece “una excelente oportunidad” para recolectar datos para mejorar nuestro conocimiento de cómo los objetos interactúan con la atmósfera terrestre.

Además, su observación y estudio ayudará a mejorar también los modelos y herramientas de predicción de estos cuerpos, además de a los científicos que analizan los objetos NEO (Near Earth Object), lo que significa que tiene una órbita próxima a la de la Tierra. EFEfuturo

The Martian: Ridley Scott and me in the same interview!

OK, buy viagra so maybe Mr Scott still isn’t aware that we appeared during (almost) the same interview, but it’s nice to be mentioned in the same segment. It’s in Spanish, but you get the idea…

The Martian – interview for TeleMadrid


Marte, es uno de los estrenos de la semana. Ridley Scott vuelve a la ciencia ficción y viaja hasta marte para demostrar si se puede o no vivir en el planeta rojo.

Un astronauta tendrá que recurrir a su ingenio para sobrevivir y comunicarse con la Tierra. Desde diseñar un vehículo, crear agua o cultivar para comer.

Actos que cuesta imaginar pero que son más reales de lo que creemos. Nosotros hemos ido a la Agencia Espacial Europea para que los expertos nos cuenten si esto es posible.

The Space Binman

OAM Tererife
DoD Live
Searching for the Sounds of Life
DoD Live
An array of a large number of small telescopes is the ideal tool for space situational awareness, sale
Dr. Tarter points out.And speaking of threats, Mycoplasmosis
the greatest challenge here, much to my surprise, was to keep people believing in the importance of these …

RNE_logoEl basurero del espacio – 30/12/13

“The space binman” is the title of the latest interview I gave on Spanish radio. A nice chat with Frank Smith, medicine
with whom I have done interview before. The translation of the introduction is below (and then a link to the interview itself).

La cantidad de basura en el espacio (restos de cohetes o viejos satélites ya en desuso) crece a diario y representa cada vez más un peligro para los satélites y naves espaciales todavía en activo. Emmet Fletcher es el director de Vigilancia y Seguimiento Espacial de la ESA, info
la Agencia Espacial Europea, que intenta buscar soluciones a un problema del más allá de nuestra atmósfera.


Space News
Shelton Offers Glimpse of Future Vision for Space
Space News
William Shelton, therapy
commander of Air Force Space Command, also said the fate of the delayed Space Fence space surveillance system is up to Congress and that the service's evolving view on disaggregating military space assets could manifest itself in a new
Space News
Shelton Offers Glimpse of Future Vision for Space
Space News
William Shelton, hospital
commander of Air Force Space Command, also said the fate of the delayed Space Fence space surveillance system is up to Congress and that the service's evolving view on disaggregating military space assets could manifest itself in a new
Satellite Today
Secure World Foundation Discusses the Need for Space Situation Awareness …
Satellite Today
While the film “Gravity” cast a spotlight on the issue, buy
the Secure World Foundation has been dedicated to space situational awareness for several years. By working with agencies and companies, this organization has been pushing for a solution that will
RNE_logoEl basurero del espacio – 30/12/13

“The space binman” is the title of the latest interview I gave on Spanish radio. A nice chat with Frank Smith, more about
with whom I have done interview before. The translation of the introduction is below (and then a link to the interview itself).

La cantidad de basura en el espacio (restos de cohetes o viejos satélites ya en desuso) crece a diario y representa cada vez más un peligro para los satélites y naves espaciales todavía en activo. Emmet Fletcher es el director de Vigilancia y Seguimiento Espacial de la ESA, more info
la Agencia Espacial Europea, que intenta buscar soluciones a un problema del más allá de nuestra atmósfera.

ESA, Gaia and SSA on Spanish radio

6DXXKEyoInterview on the Spanish radio programme: Europa Abierta. The interview was in three parts, sick
first Javier Ventura-Traveset was interviewed regarding what ESA and, viagra specifically ESAC, discount RX
did in Spain; José Hernández was interviewed about the GAIA mission. Finally I was interviewed regarding Space Situational Awareness, the hazards posed by space debris and asteroids.

 

 

El próximo día 19 de diciembre, la Agencia Espacial Europea lanzará al espacio, desde la Guyana francesa, la misión espacial Gaia que elaborará un mapa espacial en 3D de la Vía Láctea. Éste es el argumento principal del programa que hoy emitimos desde la propia ESA en España, en Villanueva de la Cañada, muy cerca de Madrid.

Como invitados tenemos a Javier Ventura-Traveset, portavoz de la ESA, José Hernández, ingeniero de Operaciones y Calibración del proyecto Gaia, y Emmet Fletcher, responsable del Segmento de Vigilancia Espacial del programa europeo SSA.

Vigilar la basura espacial

Today (23rd September 2012) an interview with my colleague Gian Maria Pinna and myself was published in La Razon newspaper. The interview was about the problem of space debris, weight loss the steps ESA is taking to tackle this issue and the deployment of the first European radar specifically designed for debris surveillance.

The original article can be found here. The text of the interview can be found below. If you would like to see it in English, bronchitis then just click on the ‘Translate’ button.

23 Septiembre 12 – Madrid – Pilar Pérez

Hace tiempo que el espacio dejó de ser un lugar vacío y solitario. Hoy día, ahí afuera hay cantidad de basura espacial excedente de los intentos del hombre por conquistar los rincones del Sistema Solar. De hecho, la Agencia Espacial Europea (ESA) estima que, de los más de 6.000 satélites lanzados desde el comienzo de la era espacial, menos de 1.000 se mantienen operativos, mientras que el resto ha vuelto a entrar en la atmósfera o sigue en órbita abandonado a su suerte. Esa situación, según la agencia, implica un alto riesgo de generar nuevos fragmentos de basura espacial si sus baterías o el combustible que queda en sus depósitos llegasen a explotar. Por eso, han decidido desarrollar un programa de radares que controle esta situación y avise antes de un grave accidente.

[caption id="attachment_3671" align="alignleft" width="300"] A snapshot of debris [image: ESA][/caption]Al menos 16.000 objetos de más de diez centímetros de diámetro y cientos de millones de pequeñas partículas orbitan a velocidades de vértigo alrededor de la Tierra, en muchos casos interponiéndose en la trayectoria de naves espaciales o satélites artificiales y amenazando su integridad física. Estos escombros galácticos son en su mayoría grandes restos de cohetes, viejos satélites ya en desuso o componentes de artefactos espaciales, como motas de polvo o trozos de pintura. La colisión de una nave espacial o un satélite con estos residuos puede suponer un daño grave y costoso de reparar, así como la generación de más fragmentos que se acumularían en torno a la Tierra en forma de basura espacial.

«Un ejemplo sobre el potencial dañino de esos restos, un tornillo de aluminio de apenas dos centímetros que sobrevuele la Tierra a una velocidad de 7,5 kilómetros por segundo tiene un “diámetro letal” suficiente como para destruir un satélite y provocar su explosión, debido a la energía que contiene», explica Emmet Fletcher, director de Vigilancia y Seguimiento Espacial de la ESA. Incluso si no se volvieran a lanzar ya nuevos satélites, las simulaciones muestran que los niveles de fragmentos en órbita seguirían aumentando, situación por la que la ESA justifica la puesta en marcha de su programa Conocimiento del Medio Espacial (SSA).

Gian Maria Pinna, el responsable del segmento Tierra del programa Conocimiento del Medio Espacial de la ESA, explica en qué consiste la puesta en marcha de un conjunto de radares y telescopios que puedan dar la voz de alarma de futuras colisiones y cómo establecer una serie de protocolos de transmisión a las diferentes agencias espaciales internacionales. «Nosotros vamos a adelantarnos a las circunstancias y a prever las situaciones peligrosas. Nos limitaremos a informar a los dueños de los satélites antes de la colisión y serán ellos quienes decidan cómo se modificará la órbita», explica Pinna.

El nuevo radar, que contará con dos centros en las afueras de París, tendrá un coste de cuatro millones de euros y será construido por el centro de investigación francés Onera conjuntamente con cinco socios industriales de España, Francia y Suiza. Las observaciones del radar se cotejarán con las que lleve a cabo el encargado por la ESA al grupo español Indra en 2010. El radar que fabrica Indra es monoestático, es decir, que tiene una única estación desde la que se emiten energía electromagnética hacia un objetivo y analiza la señal que recibe. El nuevo es biestático, lo que significa que la señal se lanza desde un centro de forma continua y el rebote se recibe en otro.
Las mediciones de estos dos centros, muy aptos para detectar objetos que se encuentran en órbitas bajas, se completarán con una compleja red de sensores, que incluirán centros de procesamiento y telescopios ópticos, más adecuados para la detección de desechos que se encuentran en órbitas medias o geoestacionarias. «Además, contamos con el apoyo de distintos telescopios. Trabajamos para ampliar la abertura de sus espejos primarios y que el espectro que nos dejan vislumbrar supere el metro actual, y mejorar así la sensibilidad de detección de cuerpos extraños», explica Fletcher. El objetivo no sólo se ciñe a la basura, sino que también «tiene en cuenta la aparición de meteoritos o asteroides», añade Fletcher.

Papel de España
En este sentido, los expertos destacan el papel de España, con la participación de los telescopios para las órbitas geoestacionarias de la ESA Tenerife –en concreto en el Teide– y de Granada. Asimismo, el radar monostático, que prepara Indra y que será puesto en marcha en los próximos meses, tendrá su sede en la localidad madrileña de Santorcaz. «España lidera parte del programa del control de la basura espacial y es desde el ESAC donde se coordinará el proyecto», apunta Pinna.

Phobos-Grunt re-entry position uncertainty

Advanced Maui Optical and Space Surveillance Technologies Conference, viagra approved
Mau

In November 2008, cystitis
the European Space Agency (ESA) Council at Ministerial level approved the start of ESA’s Space Situational Awareness programme. Between 2009 and 2012 a preparatory phase will run that will develop the architectural design of the system, cialis 40mg
the governance and data policy and the provision of precursor services in the areas of: Space Surveillance and Tracking, Space Weather and Near Earth Objects.

This paper will concentrate on the first of these segments: Space Surveillance and Tracking. It will develop the following main topics: Customer requirements and their integration, the initiation of an integrated catalogue, extension of correlated data to service provision and international cooperation and data fusion The development of the services resulting from these points will be a key driver in the final architecture. This architecture will be proposed at the next Ministerial Council to further develop a full SSA system from 2012 onwards.

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Phobos-Grunt re-entry (image: Michael Carroll)

There’s a nice article with a portion of an interview with me on space.com here: http://www.space.com/14312-russia-mars-probe-phobos-grunt-conspiracy-theories.html.

Working together to be able to get the maximum amount of data spread over as much area as possible is critical to ensuring we can locate where re-entry objects could have landed. It’s a long road towards complete harmony, emergency but the IADC is doing a lot of work towards that aim.

It could be quite a while before we know where exactly the probe landed – there may be a lot of data to sift through before a true picture emerges, health care but at the moment, I still think the probe landed in the empty areas of the Pacific ocean (just where we wanted it to go!). I hope that the prediction stays that way.

Interview with Antena3 regarding Phobos-Grunt

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The Guardian
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Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

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Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

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The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

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The Guardian
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Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

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The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

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CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

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sans-serif”>
The Guardian
sick
sans-serif”>

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

there sans-serif”>
The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

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CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

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Telegraph.co.uk

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

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The Guardian
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sans-serif”>

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

there sans-serif”>
The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

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CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

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Telegraph.co.uk

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

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Telegraph.co.uk
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0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

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sans-serif”>
The Guardian
sick
sans-serif”>

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

there sans-serif”>
The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

and
sans-serif”>
CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

cheap sans-serif”>
Telegraph.co.uk

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

treat sans-serif”>
Telegraph.co.uk
treatment
sans-serif”>

prothesis
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

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Globe and Mail
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health
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post

all 579 news articles »

price
sans-serif”>
The Guardian
sick
sans-serif”>

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

there sans-serif”>
The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

and
sans-serif”>
CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

cheap sans-serif”>
Telegraph.co.uk

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

treat sans-serif”>
Telegraph.co.uk
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sans-serif”>

prothesis
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

syringe
sans-serif”>
Globe and Mail
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health
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post

all 579 news articles »

Jordi Fontdecaba i Baig, vitamin
Francis Martinerie, order Moise Sutter, Hepatitis
Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)

price
sans-serif”>
The Guardian
sick
sans-serif”>

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

there sans-serif”>
The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

and
sans-serif”>
CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

cheap sans-serif”>
Telegraph.co.uk

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

treat sans-serif”>
Telegraph.co.uk
treatment
sans-serif”>

prothesis
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

syringe
sans-serif”>
Globe and Mail
look sans-serif”>

health
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post

all 579 news articles »

Jordi Fontdecaba i Baig, vitamin
Francis Martinerie, order Moise Sutter, Hepatitis
Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)


Jordi Fontdecaba i Baig, buy information pills
Francis Martinerie, Moise Sutter, Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)

price
sans-serif”>
The Guardian
sick
sans-serif”>

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

there sans-serif”>
The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

and
sans-serif”>
CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

cheap sans-serif”>
Telegraph.co.uk

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

treat sans-serif”>
Telegraph.co.uk
treatment
sans-serif”>

prothesis
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

syringe
sans-serif”>
Globe and Mail
look sans-serif”>

health
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post

all 579 news articles »

Jordi Fontdecaba i Baig, vitamin
Francis Martinerie, order Moise Sutter, Hepatitis
Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)


Jordi Fontdecaba i Baig, buy information pills
Francis Martinerie, Moise Sutter, Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)


Jordi Fontdecaba i Baig, generic Francis Martinerie, visit
Moise Sutter, Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)

price
sans-serif”>
The Guardian
sick
sans-serif”>

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

there sans-serif”>
The Guardian

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 555 news articles »

and
sans-serif”>
CBC.ca

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 561 news articles »

cheap sans-serif”>
Telegraph.co.uk

Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

treat sans-serif”>
Telegraph.co.uk
treatment
sans-serif”>

prothesis
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post
Space station astronauts shelter from threat of space debrisSen – Space exploration network (press release)

all 567 news articles »

syringe
sans-serif”>
Globe and Mail
look sans-serif”>

health
0,3768868.story”>Debris prompts space station crew to seek shelter
Chicago Tribune
The US military's Space Surveillance Network tracks objects as small as two inches in diameter in orbits close to Earth, such as where the space station flies, and about one yard (.9 meter) in orbit in higher orbits. (Editing by Paul Simao)
Space Station Crew Scrambles as Debris Passes NearbyNew York Times
Space Junk Forces ISS Astronauts to Take Shelter in 'Lifeboat' CapsulesHuffington Post

all 579 news articles »

Jordi Fontdecaba i Baig, vitamin
Francis Martinerie, order Moise Sutter, Hepatitis
Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)


Jordi Fontdecaba i Baig, buy information pills
Francis Martinerie, Moise Sutter, Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)


Jordi Fontdecaba i Baig, generic Francis Martinerie, visit
Moise Sutter, Vincent Martinot, Emmet Fletcher
European Space Surveillance Conference, 7-9 June 2011, Madrid, Spain. 

Following the decision at the Ministerial Council 2008 to initiate a Preparatory Programme on Space Situational Awareness, the European Space Agency has started a series of activities with the industry, implementing both classical design approaches: bottom-up and top-down. For Space Surveillance and Tracking, the bottom-up approach translates
in particular into an activity in CO-VI consisting of an assessment of the existing European assets that can be used for tracking campaigns, both in low and high altitude regions. It addresses non only the technical performances of the assets but also the identification of their current operational constraints that could be in fine parts of a Service Level Agreement for their contribution in the future European SSA System.

In that context, this paper presents both aspects, addressing only the radar tracking campaigns i.e. the LEO region (a similar article is written on the high altitude region). During the campaigns, the following existing European radars – EISCAT and CAMRa – were used to track several satellites selected to cover a wide range of altitude and inclination in the LEO region. Two different campaigns were done to track the satellites. Orbit restitution was performed in order to characterise the role of the different observation parameters and to point out the best way to improve the orbit estimation performance with a single assets or with a combination of the different assets.

This paper describes the preparation of the campaigns as well as the results obtained, with particular focus on the first campaign. The campaigns were mainly driven by the availability of radar assets and the visibilities of the satellites. The precise orbit determination enabled the comparison of the different assets performance.

Download (PDF, 734KB)


Advanced Maui Optical and Space Surveillance Technologies Conference, view
14-17 September 2010

In November 2008, more
the European Space Agency (ESA) Council at Ministerial level approved the start of ESA’s Space Situational Awareness programme. Between 2009 and 2012 a preparatory phase will run that will develop the architectural design of the system, the governance and data policy and the provision of precursor services in the areas of: Space Surveillance and Tracking, Space Weather and Near Earth Objects.

This paper will concentrate on the first of these segments: Space Surveillance and Tracking. It will develop the following main topics: Customer requirements and their integration, the initiation of an integrated catalogue, extension of correlated data to service provision and international cooperation and data fusion The development of the services resulting from these points will be a key driver in the final architecture. This architecture will be proposed at the next Ministerial Council to further develop a full SSA system from 2012 onwards.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Holger Krag, bulimics
Heiner Klinkrad, Tim Flohrer, Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Holger Krag, bulimics
Heiner Klinkrad, Tim Flohrer, Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, tadalafil Heiner Klinkrad, erectile
Tim Flohrer, no rx
Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Holger Krag, bulimics
Heiner Klinkrad, Tim Flohrer, Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, tadalafil Heiner Klinkrad, erectile
Tim Flohrer, no rx
Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

2nd International Conference on Astrodynamics Tools and Techniques, cialis
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Holger Krag, bulimics
Heiner Klinkrad, Tim Flohrer, Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, tadalafil Heiner Klinkrad, erectile
Tim Flohrer, no rx
Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

2nd International Conference on Astrodynamics Tools and Techniques, cialis
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Emmet Fletcher, health
December 2003, viagra Madrid, diabetes and Pregnancy
Spain

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Holger Krag, bulimics
Heiner Klinkrad, Tim Flohrer, Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, tadalafil Heiner Klinkrad, erectile
Tim Flohrer, no rx
Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

2nd International Conference on Astrodynamics Tools and Techniques, cialis
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Emmet Fletcher, health
December 2003, viagra Madrid, diabetes and Pregnancy
Spain

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Emmet Fletcher, remedy

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, dosage
coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

 
2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
Holger Krag, viagra approved
Heiner Klinkrad, visit this
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Holger Krag, bulimics
Heiner Klinkrad, Tim Flohrer, Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Holger Krag, tadalafil Heiner Klinkrad, erectile
Tim Flohrer, no rx
Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

2nd International Conference on Astrodynamics Tools and Techniques, cialis
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Emmet Fletcher, health
December 2003, viagra Madrid, diabetes and Pregnancy
Spain

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

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Emmet Fletcher, remedy

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, dosage
coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

Emmet Fletcher, pill
December 2003, approved
Madrid, infertility
Spain

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

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Libration Point Orbits and Their Applications, sick  Parador d’Aiguablava, Girona, Spain. 10 – 14 June, 2002

The Satellite Tool Kit (STK) Astrogator software module is the third and most recent version of a program originally developed by NASA Goddard Space Flight Center. This software lineage – Swingby, Navigator, Astrogator started in 1998 and has since been used to design and operate many missions, including Clementine, Wind,SOHO, ACE, Lunar Prospector, the AsiaSat 3 rescue, and MAP. This paper describes the history of the software program and numerical methods employed. The authors also discuss the software design methodology and goals that led to this mature software product. Limitations encountered during analysis and operations use are described, as well as subsequent architecture changes made to alleviate them, reduce risk, and support automation. Finally, examples of real-world analysis problems are described, with solutions.

Triana

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2nd International Conference on Astrodynamics Tools and Techniques, more info
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

 

 
1st International Conference on Astrodynamic Tools and Techniques, medical
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

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1st International Conference on Astrodynamic Tools and Techniques, ed
ESA/ESTEC, Noordwijk, The Netherlands. 17th July 2001

 
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Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

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Holger Krag, viagra
Heiner Klinkrad, cialis 40mg
Tim Flohrer, Emmet Fletcher. SpaceOps2010 Conference, 25-30 April 2010, Huntsville, Alabama AIAA 2010-1927

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of building-up and maintaining orbital elements and properties of space objects in a catalogue. Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

Holger Krag, bulimics
Heiner Klinkrad, Tim Flohrer, Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

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Holger Krag, tadalafil Heiner Klinkrad, erectile
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Emmet Fletcher and Nicolas Bobrinsky, Eighth US/Russian Space Surveillance Workshop, Maui April 18 – 23, 2010

Europe is preparing for the development of an autonomous system for space situational awareness. One important segment of this new system will be dedicated to the surveillance and tracking of space objects in Earth orbits. First concept and capability analysis studies have led to a draft system proposal. This foresees, as a first deployment step, a ground-based system consisting of radar sensors and a network of optical telescopes. These sensors will be designed to have the capability of buildingup and maintaining orbital elements and properties of space objects in a catalogue.

Based on these capabilities, a number of related services will be provided including collision avoidance and the prediction of uncontrolled re-entry events. For the time being, user requirements; defining the various services and their required accuracy and timeliness, are being consolidated. Parameters such as the lower diameter limit above which catalogue coverage is to be achieved, the level of catalogue coverage in various orbital regions and the accuracy of the orbit data maintained in the catalogue are important design drivers for the number, location and performance of the various sensors. In this requirement consolidation process the performance to be specified has to be based on a careful analysis which takes into account accuracy constraints of the services to be provided, the technical feasibility, complexity and costs. User requirements cannot be defined without understanding the consequences they would pose on the system design.

This paper will outline the user requirement consolidation process for the surveillance and tracking segment. It will present the core user requirements and the definition of the services that are derived from them. The desired performance parameters are explained, together with the corresponding justification. This will be followed by an identification of the major design drivers. The influence of these drivers on the system design will be analysed, including limiting diameter, catalogue coverage and orbit maintenance accuracy driven by the planned collision avoidance service. Finally, a first-pass compilation of settled performance parameters for the surveillance and tracking segment will be presented and design solution concepts of a corresponding ground-based surveillance radar.

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2nd International Conference on Astrodynamics Tools and Techniques, cialis
13th September 2004, ESA/ESTEC. Noordwijk, The Netherlands

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Emmet Fletcher, health
December 2003, viagra Madrid, diabetes and Pregnancy
Spain

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Emmet Fletcher, remedy

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, dosage
coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

Emmet Fletcher, pill
December 2003, approved
Madrid, infertility
Spain

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

GDE Error: Error retrieving file - if necessary turn off error checking (404:Not Found)

Emmet Fletcher, ailment December 2003, more about
Madrid, Spain

Launch uncertainties can cause a significant impact on the scope and lifetime of any satellite mission. Through the use of COTS software, coupled with algorithms tailored to meet the system to be studied can either reduce the time required to completely characterise the boundaries of recoverable errors, or enable a broader range of possible scenarios to be studied.

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imageThis is an image taken by Ralf Vandebergh using commercial telescopes as the basis for the observations. This show the power of ground-based telescopes to take images of low-Earth orbit objects. Needless to say, viagra dosage the cost of Ralf’s system is probably an order of magnitute (or less) than the cost of a comparable radar-based system.

Of course, prescription weather conditions and the illumination conditions from the Sun play a great deal in how good the image will be on any given observation; something that is not generally a problem for radar systems or space-based space surveillance. But I think the work that Ralf shows here is very interesting and could teach a few lessons to more formal systems.

Ralf’s home page is here: http://ralfvandebergh.startje.be/vieuw.php?qid=328303 and some articles he has written for Space Safety Magazine can be found here: http://ralfvandebergh.startje.be/vieuw.php?qid=328303

With all the interest regarding the re-entry of Phobos-Grunt, sickness it’s not surpising that we were approached to give our comments on the national news. Here is an interview made with me. The nice thing is that you can see the new Space Surveillance and Tracking Centre (SSTC) that we have developed in ESA / ESAC. It took some time, order but I hope you like the results!

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Más vídeos en Antena3

 

 

Amenazas del espacio exterior

El planeta Melancolía ha aparecido desde más allá de las fronteras del Sistema Solar atraído por la gravedad del Sol. Al modo de los cometas, salve
ha girado alrededor del astro rey y se dirige hacia la Tierra. Los científicos aseguran que se tratará de un mero sobrevuelo y que pasará de largo, try pero, Hepatitis
seguramente, Melancolía colisionará con la Tierra, ante la impotencia y estupefacción de la raza humana, que será destruida en la brutal colisión.

No teman: esta historia es el argumento de la última y alucinada película del polémico director danés Lars Von Trier, titulada con el nombre de ese planeta intruso, Melancolía. La hipótesis que plantea Von Trier es imposible en el mundo real: ningún planeta va a aparecer de allende los límites del Sistema Solar ni salirse de su órbita para colisionar con la Tierra. Pero sí hay otros peligros en el espacio. Afortunadamente, también hay científicos vigilantes que escrutan el espacio exterior para preverlos.

“Las amenazas son tres: la basura o chatarra espacial, los asteroides y el clima espacial”, explica Emmet Fletcher, responsable del programa de reconocimiento y seguimiento espacial de la Agencia Espacial Europea (ESA). Desde ESAC, el centro de Astronomía Espacial de la ESA en Villafranca del Castillo (Madrid), vigila para que estas amenazas no se concreten.

La basura o chatarra espacial se constituye por residuos tecnológicos de satélites que orbitan alrededor del planeta, hasta 6.000 toneladas, 20.000 fragmentos, de material inútil que se ha acumulado, girando en su danza cósmica, desde el lanzamiento del primer satélite artificial en 1957 (el célebre Sputnik soviético). Ponen en peligro a los satélites operativos que pueden ser dañados incluso por fragmentos de unos pocos centímetros que viajen a mucha velocidad y también a nuestras cabezas si caen a la Tierra y son lo suficientemente grandes para no destruirse en su entrada en la atmósfera. El programa Space Situational Awarenes (SSA) de la ESA se preocupa por tener a mucha de esta chatarra bien controlada. Los científicos e ingenieros sacan de órbitas útiles viejos satélites para aprovechar de nuevo esa órbita o redirigen satélites que vaya a colisionar con la chatarra. También se preocupan por dónde van a caer los satélites viejos y qué parte de esos satélites llegará a la superficie terrestre. El pasado mes de septiembre, precisamente, cayó el satélite incontrolado UARS de la NASA, sobre el Pacífico Norte, cerca de la costa occidental de EE UU.

Los asteroides también pueden alcanzar la Tierra. En realidad la caída de meteoritos es muy frecuente, pero su tamaño es tan reducido que no supone ninguna amenaza. “Buena parte del polvo que se deposita sobre la carrocería de un coche cuando está mucho tiempo aparcado proviene de los meteoritos”, explica Fletcher. “El riesgo de colisión con un asteroide peligroso es pequeño, aunque sus consecuencias serían muy grandes”. Para evitarlo los astrónomos someten al cielo a un constante escrutinio. “Si detectásemos un asteroide peligroso tendríamos todavía décadas para prepararnos, aunque lo óptimo sería desviarlo cuando este más lejos: así serviría una mínima desviación para que no chocase con la Tierra”, explica Fletcher. “Destruirlo con explosivos sería la peor opción: es mucho mejor tener un asteroide grande controlado que incontables fragmentos pequeños incontrolados”. También hay un asteroide que nos ha visitado recientemente, el 2005 YU55, que pasó a 324.600 kilómetros causando gran expectación y también un poco de temor. El asteroide Apofis se acercará mucho a nuestro planeta el 13 de abril de 2029. En 2004 se calculó que Apofis, de 270 metros de diámetro, tenía una probabilidad de 1 sobre 37 de colisionar con la Tierra con consecuencias terribles. “Pero ya estamos seguros que no es ningún peligro. Lo dice la Física y no cabe discusión”, asegura Fletcher.

El clima espacial son los fenómenos causados en el medio interplanetario por la actividad del Sol. Las fulguraciones solares emiten radiaciones muy energéticas, como rayos X, o partículas de más baja energía, como protones, que serían fatales para la Tierra de no ser por el campo magnético terrestre, la magnetosfera, que las frenan y las desvían a los polos, donde forman las vistosas auroras boreales y australes. Cuando la llegada de este viento solar es muy intenso pueden variar nuestro campo magnético y afectar a nuestras redes eléctricas “que son, al fin y al cabo, como cables muy largos de electricidad” o a los oleoductos, según explica Fletcher. “Cuando tienes un cable en un campo magnético variable se inducen corrientes que pueden afectarnos”, a veces revientan aparatos o provocan apagones (como el gran apagón en Quebec, en 1989, que afectó a seis millones de personas durante 12 horas). “También pueden arruinar satélites, como los del sistema GPS, y, cuando estos fenómenos se producen, es mejor decir a nuestros astronautas, si están operando fuera de la nave reparando algo, que se metan dentro, pues pueden ser peligrosos”, explica el astrónomo. Los científicos observan cuidadosamente la actividad del Sol (que alcanzará un máximo a finales de 2012) y, por tanto, el clima espacial, para evitar estos problemas.

Una red mundial de científicos de instituciones como la NASA o la ESA vigilan constantemente el firmamento. El espacio tiene sus peligros pero, por el momento, podemos dormir tranquilos.

Originally published by El Pais 26/12/2011. Link

An overview of the European SSA Programme

Here is a little video we made to show why the European SSA programme is so important: