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- The Indian Remote Sensing Satellite-1A (IRS-1A) was launched on March 17, 1988. IRS-1A is the first of a series of semi-operational/ operational remote sensing satellites developed by Indian Space Research Organisation (ISRO) for land-based applications such as agriculture,forestry, geology, and hydrology. The three-axis-stabilized sun-synchronous satellite carries two linear imaging self-scanned sensors (LISS). LISS-1 and LISS-II perform "pushbroom" scanning in visible and near IR bands to acquire images of the earth. Both push-broom scanning sensors operate in the four spectral bands: 0.45-0.52, 0.52-0.59, 0.62-0.68, and 0.77-0.86 micrometer. Local equatorial crossing time is fixed at around 10 a.m. The spacecraft platform, measuring 1.56 m x 1.66 m x 1.10 m, has the payload module attached on the top and a deployable solar array stowed on either side. Attitude control is provided by four momentum wheels, two magnetic torques, and a thruster system. Together these mechanisms provide an estimated accuracy of plus or minus 0.10 deg in all three axes. Group: Platform_Details Entry_ID: IRS-1A Group: Platform_Identification Platform_Category: Earth Observation Satellites Platform_Series_or_Entity: IRS (Indian Remote Sensing Satellite) Short_Name: IRS-1A Long_Name: Indian Remote Sensing Satellite-1A End_Group Group: Synonymous_Platform_Names Short_Name: IRS-1A End_Group Group: Platform_Associated_Instruments Short_Name: LISS-II Short_Name: LISS-I End_Group Group: Orbit Orbit_Altitude: 904 km Orbit_Inclination: 99.01 deg Period: 103.1minutes Repeat_Cycle: 22 days Perigee: 863 km Apogee: 917 km Orbit_Type: LEO > Low Earth Orbit > Polar Sun-Synchronous End_Group Creation_Date: 2007-10-05 Online_Resource: http://www.isro.gov.in/satellites/irs-1a.aspx Sample_Image: http://www.isro.gov.in/satellites/images/irs1a_img.gif Group: Platform_Logistics Launch_Date: 1988-03-17 Launch_Site: BAIKONUR COSMODROME, TYURATAM, RUSSIA Primary_Sponsor: India End_Group End_Group
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