 INSAT-1B before launch | |
| Mission type | Communications |
|---|---|
| Operator | INSAT |
| COSPAR ID | 1983-089B |
| SATCATno. | 14318 |
| Mission duration | 7 years |
| Spacecraft properties | |
| Spacecraft type | INSAT-1 |
| Manufacturer | Ford Aerospace |
| Launch mass | 1,152 kilograms (2,540 lb) |
| Start of mission | |
| Launch date | 30 August 1983, 06:32:00 UTC[1] |
| Rocket | Space Shuttle Challenger STS-8 /PAM-D |
| Launch site | KennedyLC-39A |
| Contractor | NASA |
| Deployment date | 31 August 1983, 07:48 (1983-08-31UTC07:48Z) UTC |
| End of mission | |
| Disposal | Decommissioned |
| Deactivated | August 1993 (1993-09) |
| Orbital parameters | |
| Reference system | Geocentric |
| Regime | Geostationary |
| Longitude | 74° east (1983-92) 93° east (1992-93) |
| Semi-major axis | 42,164.88 kilometres (26,200.04 mi) |
| Eccentricity | 0.0012393 |
| Perigee altitude | 35,741 kilometres (22,208 mi) |
| Apogee altitude | 35,846 kilometres (22,274 mi) |
| Inclination | 14.69 degrees |
| Period | 23.93 hours |
| Epoch | 14 November 2013, 15:52:38 UTC[2] |
INSAT-1B was an Indiancommunications satellite which formed part of theIndian National Satellite System. Launched in 1983, it was operated ingeostationary orbit at a longitude of 74 degrees east.[3] At the end of its seven-year design life it was replaced by the newly launchedINSAT-1D, dropping to backup status. In 1992, it was relocated to 93° east, before being decommissioned in August 1993.[3]
Built byFord Aerospace and operated by theIndian National Satellite System,[3] INSAT-1B was based upon a customsatellite bus developed for theINSAT-1 series of satellites. It had a mass at launch of 1,152 kilograms (2,540 lb), and was expected to operate for seven years. The spacecraft carried twelveC and threeS band transponders, powered by a singlesolar array.[3] A stabilisation boom was used to counterbalance radiation torques from the satellite's asymmetrical design.[4] The spacecraft was propelled by anR-4D-11apogee motor.
INSAT-1B was deployed bySpace Shuttle Challenger during theSTS-8 mission.Challenger lifted off fromLaunch Complex 39A at theKennedy Space Center at 06:32:00 UTC on 30 August 1983.[1] INSAT-1B was deployed from the orbiter's payload bay at 07:48 UTC on 31 August, with aPAM-D upper stage firing shortly afterwards to place it intogeosynchronous transfer orbit. The spacecraft used its own propulsion system to raise itself intogeostationary orbit. It received theInternational Designator 1983-089B andSatellite Catalog Number 14318.[5]
After some initial problems deploying its solar array,[6] INSAT-1B became operational in October 1983. It was located at 74° east for most of its operational life, before being moved to 93° east in 1992. In August 1993 it was decommissioned and raised to agraveyard orbit slightly above geosynchronous altitude.[3] As of 14 November 2013, it is in an orbit with aperigee of 35,741 kilometres (22,208 mi), anapogee of 35,846 kilometres (22,274 mi),inclination of 14.69 degrees and anorbital period of 23.93 hours.[2]
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