AsiaSat 1
AsiaSat 1 was a Hong Kong communications satellite, which was owned, and was operated, by the Hong Kong based Asia Satellite Telecommunications Company. It was originally launched in February 1984 as Westar 6, but following a booster motor failure it was retrieved and returned to Earth in November of that year by Space Shuttle mission STS-51-A. After being sold to AsiaSat and refurbished, it was relaunched in April 1990, and positioned in geostationary orbit at a longitude of 100.5° East. It spent its operational life at 100.5° East,[1] from where it was used to provide fixed satellite services, including broadcasting, audio and data transmission, to Asia and the Pacific Ocean.[2]
| Names | Westar 6 |
|---|---|
| Mission type | Communications |
| Operator | AsiaSat |
| COSPAR ID | 1990-030A |
| SATCAT no. | 20558 |
| Website | https://www.asiasat.com |
| Mission duration | 9 years (planned) 12.5 years (achieved) |
| Spacecraft properties | |
| Spacecraft | AsiaSat-1 |
| Bus | HS-376 |
| Manufacturer | Hughes Space and Communications |
| Launch mass | 1,244 kg (2,743 lb) |
| Dry mass | 620 kg (1,370 lb) |
| Dimensions | 2.16 m (7 ft 1 in) diameter 6.6 m (22 ft) height stowed: 2.84 m (9 ft 4 in) |
| Power | 850 watts |
| Start of mission | |
| Launch date | 7 April 1990, 13:30:02 UTC |
| Rocket | Long March 3 |
| Launch site | Xichang, LA-3 |
| Contractor | CGWIC |
| Entered service | June 1990 |
| End of mission | |
| Disposal | Graveyard orbit |
| Deactivated | January 2003 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geostationary orbit |
| Longitude | 100.5° East (1990–1999) 122° East (1999–2003) |
| Transponders | |
| Band | 24 C-band |
| Bandwidth | 36 MHz |
| Coverage area | Asia, Pacific Ocean |
Westar 6 edit
As Westar 6, the satellite was built by Hughes Space and Communications. It was based on the HS-376 satellite bus. At launch it had a mass of 1,244 kg (2,743 lb),[2] and a design life of thirteen years. It carried twenty four C-band transponders.[1] After launch from the Space Shuttle as part of mission STS-41-B its PAM-D booster rocket misfired, and the satellite was stranded in a useless low orbit. It was retrieved by shuttle astronauts in November 1984, and Hughes was contracted to refurbish it. Westar 6 was eventually sold, for US$58 million, to the AsiaSat consortium and renamed AsiaSat 1.[2]
Re-Launch edit
The launch of AsiaSat 1 was contracted to the China Great Wall Industry Corporation (CGWIC), and used a Long March 3 launch vehicle. The launch was conducted from Xichang Launch Area 3 (LA-3) at the Xichang Satellite Launch Centre at 13:30:02 UTC on 7 April 1990.[3]
Mission edit
Asiasat 1 was replaced by AsiaSat 3S in May 1999. It remains in a graveyard orbit.
See also edit
- Palapa B2, a communications satellite that was also retrieved and relaunched by the Space Shuttle