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The Indian Remote Sensing Satellite-1A (IRS-1A) was the first of a series of semi-operational/operational remote sensing satellites developed by India for land-based applications such as agriculture, forestry, geology, and hydrology. The three-axis-stabilized sun-synchronous satellite carried two linear imaging self-scanned sensors (LISS) which performed "pushbroom" scanning in visible and near IR bands to acquire images of the earth. Local equatorial crossing time was fixed at around 10 a.m. The spacecraft platform, measuring 1.56 m x 1.66 m x 1.10 m, had the payload module attached on the top and a deployable solar array stowed on either side. Attitude control was provided by four momentum wheels, two magnetic torques, and a thruster system. Together they gave an estimated accuracy of better than plus or minus 0.10 deg in all three axes. Further information can be found in "The Indian Remote Sensing Satellite: a Program Overview," Proc. Indian Acad. Sci, v. 6, pp. 313-336, 1983, by R. R. Navalgund and K. Kasturirangan.

Alternate Names

  • 18960
  • Indian Remoste Sensing Satellite 1A

Facts in Brief

Launch Date: 1988-03-17
Launch Vehicle: Vostok
Launch Site: Tyuratam (Baikonur Cosmodrome), U.S.S.R
Mass: 850 kg

Funding Agency

  • Indian Space Research Organization (India)


  • Earth Science

Additional Information

Questions and comments about this spacecraft can be directed to: Coordinated Request and User Support Office



NameRoleOriginal AffiliationE-mail
Dr. K. KasturiranganGeneral ContactISRO Satellite
Dr. K. KasturiranganProject DirectorISRO Satellite
Mr. K. NavalgundProject ScientistSpace Applications Center
Dr. P. N. JayaramanProject ScientistISRO Satellite Center
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