IRS1-A

IRS-1A, the first of the series of indigenous state-of-art remote sensing satellites, was successfully launched into a polar sun-synchronous orbit on March 17, 1988 from the Soviet Cosmodrome at Baikonur. IRS-1A carries two cameras, LISS-I and LISS-II with resolutions of 73 metres and 36.25 metres respectively with a swath width of about 140 km during each pass over the country. Mission completed during July 1996 after serving for 8 years and 4 months. Mission Operational Remote Sensing Weight 975 kg Onboard power 600 Watts Communication S-band, X-band and VHF(commanding only) Stabilization Three axis body stabilized (zero momentum) with 4 Reactions Wheels, Magnetic torquers RCS Monopropellant Hydrazine based with sixteen 1 Newton thrusters Payload Three solid state Push Broom Cameras: LISS-1(72.5 metre resolution), LISS-2A and LISS-2B (36.25 metre resolution) Launch date March 17, 1988 Launch site Baikanur Cosmodrome Kazakhstan Launch vehicle Vostok Orbit 904 km Polar Sun-synchronous Inclination 99.08o Repetivity 22 days (307 orbits) Local time 10.30 a.m. (descending node) Mission completed during July 1996