 TDRS-D being deployed from Discovery | |
| Mission type | Communication |
|---|---|
| Operator | NASA |
| COSPAR ID | 1989-021B |
| SATCAT no. | 19883 |
| Mission duration | Planned: 10 years Final: 22 years, 9 months |
| Spacecraft properties | |
| Bus | TDRS |
| Manufacturer | TRW |
| Launch mass | 2,108 kg (4,647 lb) [1] |
| Dimensions | 17.3 × 14.2 m (57 × 47 ft) |
| Power | 1700 watts |
| Start of mission | |
| Launch date | 13 March 1989, 14:57:00 UTC |
| Rocket | Space Shuttle Discovery STS-29R / IUS |
| Launch site | Kennedy Space Center, LC-39B |
| Contractor | Rockwell International |
| End of mission | |
| Disposal | Retired to graveyard |
| Declared | December 2011 |
| Deactivated | May 2012 |
| Orbital parameters | |
| Reference system | Geocentric orbit |
| Regime | Geostationary orbit |
| Longitude | 41.0° West (1988–2005) 46.0° West (2005–2011) |
| Epoch | 14 March 1989 [2] |
TDRS-4, known before launch as TDRS-D, is an American communications satellite, of first generation, which was operated by NASA as part of the Tracking and Data Relay Satellite System from 1989 until 2011. It was constructed by TRW, based on a custom satellite bus which was used for all seven of the first generation TDRS satellites.[3]
- ^ "UCS Satellite Database". Union of Concerned Scientists. 1 July 2009. Retrieved 9 August 2009.
- ^ "NASA – NSSDCA – Spacecraft – Trajectory Details". nssdc.gsfc.nasa.gov. Retrieved 2 May 2018.
This article incorporates text from this source, which is in the public domain.
- ^ Krebs, Gunter. "TDRS 1, 2, 3, 4, 5, 6". Gunter's Space Page. Retrieved 9 August 2009.
