Communication Satellite GSAT-31
Science & Technology
7th Feb, 2019
European launch services company Arianespace launched India’s latest communication satellite GSAT-31 successfully from French Guiana.
- GSAT-31 is the country’s 40th communication satellite which is configured on ISRO’s enhanced ‘I-2K Bus’.
- GSAT-31 separated from the launch vehicle in an elliptical Geosynchronous Transfer Orbit with a perigee – the nearest point to Earth – of 250 km and an apogee – the farthest point from Earth – of 35,850 km, inclined at an angle of 3 degrees to the equator.
- The launch vehicle for GSAT- 31 was Ariane 5 VA-247.
- GSAT-31 derives its heritage from ISRO’s earlier INSAT/GSAT satellite series.
- It is configured on ISRO’s enhanced I-2K Bus, utilizing the maximum bus capabilities of this type.
Salient Features of GSAT-31
- Launch mass : 2535 kg
- Spacecraft power : 7 kW
- Payload : Ku-band transponders
- Coverage area : Indian mainland and island
- Mission life : Around 15 years
- The satellite will provide continuity to operational services on some of the in-orbit satellites.
- GSAT-31 has a unique configuration of providing flexible frequency segments and flexible coverage.
- Two Ku-band beacon downlink signals are transmitted by the satellite for ground tracking purpose.
- Researchers will undertake phase-wise orbit-raising manoeuvres to place the satellite in geostationary orbit – 36,000 km above the equator – in the coming days using its on-board propulsion system.
- GSAT-31 will provide DTH Television Services, connectivity to VSATs for ATM, Stock-exchange, Digital Satellite News Gathering (DSNG) and e-governance applications.
- This satellite will augment the Ku-band transponder capacity in geostationary orbit and will also be used for bulk data transfer for a host of emerging telecommunication applications.
- The satellite also provides wide beam coverage using a wide beam transponder to facilitate communication over large oceanic region, comprising large parts of Arabian Sea, Bay of Bengal and Indian Ocean.
- GSAT -30 is another geostationary satellite to be lofted soon by Arianespace for ISRO.