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Launch Date:29.08.1991

irs-1b img

IRS-1B is the follow-on mission to the IRS-1A satellite, with certain improved technological features such as gyro referencing for better orientation, time tagged commanding facility for more flexibility in camera operation and line count information for better data product generation. It was successfully launched into a polar sun-synchronous orbit on August 29, 1991 from the Soviet Cosmodrome at Baikonur. IRS-1B carried two cameras, Linear Imaging Self Scanner (LISS)-I and LISS-II with spatial resolutions of 73 metres and 36.25 metres respectively with a swath of about 145 km.

Mission Operational Remote Sensing
Orbit 904 km Polar Sun-Synchronous
Orbit Inclination 99.028o
Lift-off Mass 975 kg
Orbit Period 103.92 min
Local Time of Equator crossing 10:30 A.M.
Repetitivity 22 days

Three Solid State Push Broom Camers viz.,

LISS-1, LISS-2A and LISS-2B operating in 4 bands (B1: 0.45-0.52 µm; B2: 0.52-0.59 µm; B3: 0.62-0.68 µm; B4: 0.77-0.86 µm)

LISS-1: 72.5 m resolution, 148 km swath, 7 bit radiometry

LISS-2A and LISS 2B: 36.25 m resolution, 74 km swath (145 Combined), 7 bit radiometry

Attitude and Orbit Control 3-axis body stabilized with 4 reaction wheels and magnetic torquers
Power Solar Array generating 620 W backed by 2 Ni-Cd batteries of 40 AH capacities each
Launch date August 29, 1991
Launch site Baikanur Cosmodrome, Kazakhstan
Launch vehicle Vostok
Mission life 3 Years (Nominal)
Orbital life 12 years and 4 months (Completed on December 20, 2003)
    Site last updated: Monday 11 December 2017
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