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IRS -1A

Launch Date:17.03.1988

irs1a

IRS-1A is the first operational indigenous state-of-art remote sensing satellite. It was successfully launched into a polar sun-synchronous orbit on March 17, 1988 from the Soviet Cosmodrome at Baikonur. IRS-1A 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.  
The main objectives of IRS-1A mission:

1. Design, develop and deploy a 3-axis stablised polar sun-synchronous satellite carrying pushbroom cameras operating in Visible and near Infrared bands  

2. Establish and routinely operate ground based systems for satellite data reception, recording, processing, data product generation, analysis, archival and dissemination as well as mission control facilities.

3. To use the data from IRS Satellite in conjunction with supplementary/ complementary information from other sourcs for survey and management of resources in important areas such as agriculture, water resources, forestry, geology, in association with user agencies.


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
Payloads

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 March 17, 1988
Launch site Baikanur Cosmodrome, Kazakhstan
Launch vehicle Vostok
Mission life 3 Years (Nominal)
Orbital life 8 years and 4 months (Completed on July 1996)
    Site last updated: Monday 11 December 2017
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