IRS 1A [ISRO]
IRS 1A and 1B (Indian Remote Sensing Satellite) were the first of the series of indigenous state-of-art remote sensing satellites.
IRS-1A, was successfully launched into a polar sun-synchronous orbit on 17 March 1988 from the Soviet Cosmodrome at Baikonur on a Vostok-2M booster. IRS-1A carried two cameras, LISS-I and LISS-II with resolutions of 73 meters and 36.25 meters respectively with a swath width of about 140 km during each pass over the country. Its mission was completed during July 1996 after serving for 8 years and 4 months.
IRS-1B was launched on 29 August 1991 also on a Vostok-2M booster. It had some improved features compared to its predecessor: gyro referencing for better orientation sensing, time tagged commanding facility for more flexilibility in camera operation and line count information for better data product generation. The missiion of IRS-1B ended on 20 December 2003 after serving for 12 years and 4 months.
An engineering model was later modified into the IRS 1E satellite.
Nation: | India |
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Type / Application: | Earth observation |
Operator: | ISRO |
Contractors: | ISRO |
Equipment: | LISS-I, LISS-IIA/B |
Configuration: | IRS-1 Bus |
Propulsion: | ? |
Power: | 2 deployable solar arrays, batteries |
Lifetime: | |
Mass: | 975 kg (#1A); 980 kg (#!B) |
Orbit: | 894 km × 912 km, 98.8° (#1A); 890 km × 917 km, 99.1° |
Satellite | COSPAR | Date | LS | Launch Vehicle | Remarks | |
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IRS 1A | 1988-021A | 17.03.1988 | Ba LC-31/6 | Vostok-2M | ||
IRS 1B | 1991-061A | 29.08.1991 | Ba LC-31/6 | Vostok-2M |