BackForward Satellite Programme: Indian National Satellite - 1 

Programme details
Programme description
  • Series of 4 satellites in geostationary orbit for domestic telecommunications and operational meteorology.
  • Indian programme: ISRO responsible of development and operations.
  • The satellites are actively stabilised over 3 axes.
  • The design lifetime is 5 years.
  • Two geostationary positions, around 74°E and 93°E.
  • Replacement policy: two satellites at any time, in the two nominal positions; launches in each position at roughly 3-year intervals.
  • See detailed description at
Data circulation
  • Real-time data downlink to the ISRO mission operation centre.
  • Data from the meteorological instruments acquired, processed and disseminated by IMD.
Agencies ISRO
Programme lifetime 1982 - 2002
Associated satellites and instruments

Note: red tag => no longer operational , green tag => operational , blue tag => planned