TV-SAT 1
TV-SAT 1 or TVSAT-1 was a West German communications satellite, which was to have been operated by Deutsche Bundespost. It was intended to provide television broadcast services to Europe, but it failed before entering service. It was built by Aérospatiale, was based on the Spacebus 300 satellite bus, and carried five Ku-band transponders. At launch it had a mass of 2,144 kg (4,727 lb), and an expected operational lifespan of eight years.[2]
| Names | TVSAT-1 |
|---|---|
| Mission type | Communication |
| Operator | Deutsche Bundespost |
| COSPAR ID | 1987-095A |
| SATCAT no. | 18570 |
| Website | https://www.telekom.com/en |
| Mission duration | 8 years (planned) Failed on orbit |
| Spacecraft properties | |
| Spacecraft type | Spacebus |
| Bus | Spacebus 300 |
| Manufacturer | Eurosatellite (Aérospatiale) and Messerschmitt-Bölkow-Blohm (MBB) |
| Launch mass | 2,144 kg (4,727 lb) |
| Dimensions | 2.4 x 1.64 x 6.4 m |
| Power | 4.5 kW |
| Start of mission | |
| Launch date | 21 November 1987, 02:19:00 UTC |
| Rocket | Ariane 2 (V20) |
| Launch site | Centre Spatial Guyanais, Kourou, ELA-2 |
| Contractor | Arianespace |
| Entered service | Failed on orbit |
| End of mission | |
| Disposal | Graveyard orbit |
| Deactivated | February 1988 |
| Orbital parameters | |
| Reference system | Geocentric orbit[1] |
| Regime | Geostationary orbit |
| Longitude | 19.2° West |
| Transponders | |
| Band | 5 Ku-Band[1] |
| Bandwidth | 27 MHz |
| Coverage area | Europe, Germany |
TV-Sat constellation | |
Launch edit
TV-SAT 1 was launched by Arianespace using an Ariane 2 rocket flying from ELA-2 at Centre Spatial Guyanais, Kourou, French Guiana. The launch took place at 02:19:00 UTC on 21 November 1987.[3] It was the first Spacebus 300 satellite to be launched. Immediately after launch, one of its solar panels failed to deploy, so that the main uplink antenna, behind the solar panel, could not deploy either.[4] This failure was caused by the presence of two hold-down bolts,[1] which should have been removed before launch.[4]
Mission edit
Despite the failure, TV-SAT 1 was placed into a geostationary orbit at a longitude of 19.2° West.[2][1][5] It was briefly used for a series of tests to verify the satellite's systems, before it was retired to a graveyard orbit in February 1988.[4]
TV-Sat 2 followed on 8 August 1989.
See also edit
References edit
- ^ a b c d "Tvsat 1". TSE. 28 February 2021. Retrieved 17 April 2021.
- ^ a b Krebs, Gunter (21 July 2019). "TV-Sat 1, 2". Gunter's Space Page. Retrieved 17 April 2021.
- ^ McDowell, Jonathan (14 March 2021). "Launch Log". Jonathan's Space Report. Retrieved 17 April 2021.
- ^ a b c Harland, David M; Lorenz, Ralph D. (2005). Space Systems Failures (2006 ed.). Chichester: Springer-Praxis. ISBN 0-387-21519-0.
- ^ Wade, Mark. . Encyclopedia Astronautica. Archived from the original on 29 August 2002. Retrieved 6 July 2009.