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The INSAT-1 satellite program incorporated two three-axis stabilized spacecraft in geostationary orbit (INSAT-1A at 74 degrees E and INSAT-1B at 94 degrees E) with a host of ground stations throughout India. The INSAT-1A satellite, built by the Ford Aerospace and Communications Corporation, was designed to provide combined telecommunications, direct TV broadcast, and meteorological service to India's civilian community over a 7-year-in-orbit lifespan. The telecommunications package provided two-way, long distance telephone circuits and direct radio and TV broadcasting to the remotest areas of India. The meteorology package was composed of a scanning very-high-resolution, two-channel radiometer (VHRR) to provide full-frame, full-earth coverage every 30 minutes. The visual channel (0.55-0.75 micrometer) had a 2.75-km resolution while the IR channel (10.5-12.5 micrometers) had an 11-km resolution. Using the Insat TV capability, early warnings of impending disasters (i.e., floods, storms, etc.) could directly reach the civilian population, even in remote areas. The INSAT-1A also had a data channel for relaying meteorological, hydrological, and oceanographic data from unattended land-based or ocean-based data collection and transmission platforms.

Alternate Names

  • Indian National Satellite 1A
  • 13129

Facts in Brief

Launch Date: 1982-04-10
Launch Vehicle: Delta
Launch Site: Cape Canaveral, United States
Mass: 1152.1 kg

Funding Agencies

  • Indian Space Research Organization (India)
  • NASA-Office of Space Transportation Operations (United States)


  • Communications

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. J. P. SinghProgram ManagerISRO Satellite Center
Dr. P. P. KaleProject ManagerIndia Department of Space
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