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STENTOR (satellite)

STENTOR (Satellite de Télécommunications pour Expérimenter les Nouvelles Technologies en Orbite) was a French communications satellite which was lost in a launch failure in 2002. Intended for operation by CNES, France Telecom, and Direction générale de l'armement (DGA). To validate, in flight, advanced technologies which would be integrated in the next generation of telecommunications spacecraft. It will also demonstrate new telecommunications services, including broadband and multimedia transmissions to small user terminals.

STENTOR
NamesSatellite de Télécommunications pour Expérimenter les Nouvelles Technologies en Orbite
Mission typeTechnology demonstration,
Communications
OperatorCNES / France Telecom / DGA
Websitehttps://cnes.fr/fr
Mission duration9 years (planned)
Failed to orbit
Spacecraft properties
SpacecraftSTENTOR
Spacecraft typeSpacebus
BusSpacebus-3000B3
ManufacturerAlcatel Space (bus)
Astrium (avionics)
Launch mass2,210 kg (4,870 lb)
Dry mass1,186 kg (2,615 lb)
Dimensions4.5 x 3.2 x 2.6 m
Span: 15.6 m in orbit
Power2.1 kW
Start of mission
Launch date11 December 2002, 22:22 UTC
RocketAriane 5ECA (V157)
Launch siteCentre Spatial Guyanais, ELA-3
ContractorArianespace
Entered serviceFailed to orbit
Orbital parameters
Reference systemGeocentric orbit (planned)
RegimeGeostationary orbit
Longitude11° West
Transponders
Band7 transponders:
6 Ku-band
1 EHF transponder
Coverage areaEurope, France

STENTOR was constructed by Alcatel Space (bus), and Astrium (avionics) was based on the Spacebus-3000B3 satellite bus. It had a mass of 2,210 kg (4,870 lb) and was expected to have an operational lifespan of 9 years. The spacecraft was equipped with 6 Ku-band transponders, plus 1 Extremely high frequency (EHF) transponder. It would have broadcast in Europe and France.

Arianespace was contracted to launch SRENTOR on the maiden flight of the Ariane 5ECA launch vehicle, an upgraded version of the Ariane 5 intended to offer increased payload capacity to Geostationary transfer orbit (GTO). The STENTOR technology demonstration satellite, to have been operated by the French space agency CNES, was aboard the launch vehicle. The launch took place from ELA-3 at Centre Spatial Guyanais, at Kourou, in French Guiana, at 22:22 UTC on 11 December 2002, bound for Geostationary transfer orbit (GTO).

Around three minutes after liftoff, performance issues with the first stage's Vulcain 2 engine — which was making its first flight — began to be noted. By the time of fairing separation, 183 seconds into the flight, the rocket was tumbling out of control. It began to lose altitude and speed, before being destroyed by range safety officer 456 seconds after launch. The failure was attributed to an engine cooling problem which developed around 96 seconds into the mission, causing the engine to destroy itself. Due to the failure the next Ariane 5 launch, which had been scheduled to carry the European Space Agency's (ESA) Rosetta spacecraft in January 2003, was delayed - causing Rosetta to miss its launch window for a mission to comet 46P/Wirtanen. Rosetta was subsequently retargeted to 67P/Churyumov–Gerasimenko and launched successfully in 2004.

  1. "Eutelsat Statement of Launch Failure of Hot Bird 7". SpaceRef. 11 December 2002. Retrieved16 April 2021.
  2. "STENTOR". Gunter's Space Page. 3 August 2018. Retrieved16 April 2021.
  3. "Launch Kit - HOT BIRD 7 and STENTOR"(PDF). Arianespace. Archived from the original(PDF) on 4 October 2013. Retrieved16 April 2021.
  4. McDowell, Jonathan (14 March 2021). "Launch Log". Jonathan's Space Page. Retrieved16 April 2021.
  5. "Mission Status Center". Spaceflight Now. 12 December 2002. Retrieved4 October 2013.
  6. Harland, David M.; Lorenz, Ralph D. (2005). Space Systems Failures (2006 ed.). Chichester: Springer-Praxis. p. 149. ISBN 0-387-21519-0.

STENTOR (satellite)
STENTOR satellite Language Watch Edit 160 160 Redirected from Stentor satellite STENTOR Satellite de Telecommunications pour Experimenter les Nouvelles Technologies en Orbite was a French communications satellite which was lost in a launch failure in 2002 Intended for operation by CNES France Telecom and Direction generale de l armement DGA To validate in flight advanced technologies which would be integrated in the next generation of telecommunications spacecraft It will also demonstrate new telecommunications services including broadband and multimedia transmissions to small user terminals 1 STENTORNamesSatellite de Telecommunications pour Experimenter les Nouvelles Technologies en OrbiteMission typeTechnology demonstration CommunicationsOperatorCNES France Telecom DGAWebsitehttps cnes fr frMission duration9 years planned Failed to orbitSpacecraft propertiesSpacecraftSTENTORSpacecraft typeSpacebusBusSpacebus 3000B3ManufacturerAlcatel Space bus Astrium avionics Launch mass2 210 kg 4 870 lb Dry mass1 186 kg 2 615 lb Dimensions4 5 x 3 2 x 2 6 m Span 15 6 m in orbitPower2 1 kWStart of missionLaunch date11 December 2002 22 22 UTCRocketAriane 5ECA V157 Launch siteCentre Spatial Guyanais ELA 3ContractorArianespaceEntered serviceFailed to orbitOrbital parametersReference systemGeocentric orbit planned RegimeGeostationary orbitLongitude11 WestTranspondersBand7 transponders 6 Ku band 1 EHF transponderCoverage areaEurope France Satellite description EditSTENTOR was constructed by Alcatel Space bus and Astrium avionics was based on the Spacebus 3000B3 satellite bus It had a mass of 2 210 kg 4 870 lb and was expected to have an operational lifespan of 9 years The spacecraft was equipped with 6 Ku band transponders plus 1 Extremely high frequency EHF transponder 2 It would have broadcast in Europe and France Launch EditArianespace was contracted to launch SRENTOR on the maiden flight of the Ariane 5ECA launch vehicle an upgraded version of the Ariane 5 intended to offer increased payload capacity to Geostationary transfer orbit GTO The STENTOR technology demonstration satellite to have been operated by the French space agency CNES was aboard the launch vehicle 3 The launch took place from ELA 3 at Centre Spatial Guyanais at Kourou in French Guiana at 22 22 UTC on 11 December 2002 4 bound for Geostationary transfer orbit GTO Around three minutes after liftoff performance issues with the first stage s Vulcain 2 engine which was making its first flight began to be noted By the time of fairing separation 183 seconds into the flight the rocket was tumbling out of control It began to lose altitude and speed before being destroyed by range safety officer 456 seconds after launch 5 The failure was attributed to an engine cooling problem which developed around 96 seconds into the mission causing the engine to destroy itself 6 Due to the failure the next Ariane 5 launch which had been scheduled to carry the European Space Agency s ESA Rosetta spacecraft in January 2003 was delayed causing Rosetta to miss its launch window for a mission to comet 46P Wirtanen Rosetta was subsequently retargeted to 67P Churyumov Gerasimenko and launched successfully in 2004 6 References Edit Spaceflight portal Eutelsat Statement of Launch Failure of Hot Bird 7 SpaceRef 11 December 2002 Retrieved 16 April 2021 STENTOR Gunter s Space Page 3 August 2018 Retrieved 16 April 2021 Launch Kit HOT BIRD 7 and STENTOR PDF Arianespace Archived from the original PDF on 4 October 2013 Retrieved 16 April 2021 McDowell Jonathan 14 March 2021 Launch Log Jonathan s Space Page Retrieved 16 April 2021 Mission Status Center Spaceflight Now 12 December 2002 Retrieved 4 October 2013 a b Harland David M Lorenz Ralph D 2005 Space Systems Failures 2006 ed Chichester Springer Praxis p 149 ISBN 0 387 21519 0 Retrieved from https en wikipedia org w index php title STENTOR satellite amp oldid 1018204595, wikipedia, wiki, book,

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