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Home : Missions : Communication : SALIENT FEATURES OF GSAT-8 Last updated on: 29-Jun-2015

SALIENT FEATURES OF GSAT-8


Mission High Power Communication satellite
Payload
  • 24 Ku Band (140W radiatively cooled TWTAs) for India main land and Andaman & Nicobar coverage
  • GPS Aided Geo Augmented Navigation (GAGAN) Payload in L1 and L5 bands (40W SSPAs) for satellite based navigation
Orbit / location Geostationary orbit, 550 East longitude
Mission life > 12 years
Platform I-3K bus
Cuboid Size 2.0m x 1.77m x 3.1m
Dry Mass 1425.7 kg
Lift - off Mass 3091 kg
Power
  • Solar panel with advanced triple junction cells providing 6.4 kW power
  • Eclipse support using 3 numbers of 100Ah Li-Ion batteries
Control System 3-axes body stabilized in orbit using Earth sensors, Sun sensors, Momentum and Reaction Wheels, Magnetic torquers and eight 10N and eight 22N bipropellant thrusters
Propulsion System Bipropellant system mono Methyl Hydrazine (MMH) as fuel and Mixed oxides of Nitrogen (MON-3) as oxidizer with
  • One 440N Liquid Apogee Motor (LAM) for orbit raising
  • 16 thrusters for Station keeping (eight 10N and eight 22N bipropellant thrusters)
TTC System Conventional C-band Telemetry, Tracking & Command Systems
Antennas
  • Two indigenous developed 2.2m diameter Dual gridded reflectors (DGRs) for Ku band
  • 0.6m C-band and 0.8x0.8 sq.m L-band helix antenna for GAGAN
Special Features / New Technologies First Spacecraft with indigenously developed 2.2m diameter Dual gridded reflectors (DGRs)
Launch Launched on 21st May 2011 onboard Ariane-5
Present status In-orbit