GSAT is a series of experimental Indian communications, research and technology satellites of ISRO.

The first satellite ( GSAT -1, also called GramSat 1 ) was launched on 18 April 2001 by a GSLV rocket into a geostationary orbit. He was used for experiments on the transmission of digital information ( audio, Internet, digital television). The satellites are based on India's satellite bus I- 2000 ( I- 2K) and I- 3000 (I- 3K ). Some satellites are part of the Insat series.

List of Satellite

Comments on the satellite

  • GSAT -1: The satellite did not quite reach the intended position, as the Russian 12KRB upper stage burned only 698 instead of the planned 710 seconds. The satellite consumed so as to reach a large part of his own fuel to this. As a payload of 1540 kg, the satellite carried three C-band (two with 50 watts and a 10 watt output ) and two S -band transponders with 70 watts of power. The expected life was three years.
  • GSAT -2: As a payload of 1825 kg, the satellite carried four C-band and Ku -band transponders two. The satellite was next to another scientific experiments including sensors for measuring the solar X-rays.
  • GSAT -3: As payload was 1950 kg satellite six C-band and six Ku -band transponders ( with 1.2 - m multi- beam antenna ). The expected life was seven years.
  • GSAT -6: As a payload of 2132 kg, the satellite will carry five CxS and five SxC transponder. Its expected lifetime is twelve years.
  • GSAT -7: Military communications satellite with C-, S-, Ku- and UHF - band transponders
  • GSAT -8: 18 Ku-band transponders, two BSS transponders, GAGAN system
  • GSAT -12: 12 C-band transponder