IRS-1B
Indian Earth observation satellite / From Wikipedia, the free encyclopedia
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IRS-1B, Indian Remote Sensing satellite-1B, the second of the series of indigenous state-of-art remote sensing satellites, was successfully launched into a polar Sun-synchronous orbit on 29 August 1991 from the Soviet Cosmodrome at Baikonur. IRS-1B carries two sensors, LISS-1 and LISS-2, with resolutions of 72 m (236 ft) and 36 m (118 ft) respectively with a swath width of about 140 km (87 mi) during each pass over the country. It was a part-operational, part-experimental mission to develop Indian expertise in satellite imagery. It was a successor to the remote sensing mission IRS-1A, both undertaken by the Indian Space Research Organisation (ISRO).[3]
Names | Indian Remote Sensing satellite-1B |
---|---|
Mission type | Earth observation |
Operator | ISRO |
COSPAR ID | 1991-061A ![]() |
SATCAT no. | 21688 |
Website | https://www.isro.gov.in/ |
Mission duration | 3 years (planned) 10 years (achieved) |
Spacecraft properties | |
Spacecraft | IRS-1B |
Bus | IRS-1 |
Manufacturer | Indian Space Research Organisation |
Launch mass | 975 kg (2,150 lb) |
Dry mass | 895 kg (1,973 lb) |
Dimensions | 1.56 m x 1.66 m x 1.10 m |
Power | 600 watts |
Start of mission | |
Launch date | 29 August 1991, 06:48:43 UTC |
Rocket | Vostok-2M s/n I15000-079 |
Launch site | Baikonur Cosmodrome, Site 31 |
Contractor | OKB-1 |
Entered service | November 1991 [1] |
End of mission | |
Deactivated | 1 July 2001 [1] |
Orbital parameters | |
Reference system | Geocentric orbit[2] |
Regime | Sun-synchronous orbit |
Perigee altitude | 859 km (534 mi) |
Apogee altitude | 915 km (569 mi) |
Inclination | 99.2° |
Period | 102.7 minutes |
Instruments | |
Linear Imaging Self-Scanning Sensor-1 (LISS-1) Linear Imaging Self-Scanning Sensor-2 (LISS-2) | |