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ISRO’S GSAT 31 communications satellite successfully placed in geostationary orbit aboard Ariane 5

ISRO’s busy launch schedule for this year continues, as the Indian space agency has completed yet another successful satellite launch. The agency launched GSAT 31 communications satellite in the early hours today and successfully placed it in the geostationary orbit. The satellite was launched aboard an Ariane 5 rocket.

The launch vehicle Ariane 5 VA-247 lifted off from Kourou Launch Base, French Guiana at 2:31 am (IST) carrying India’s GSAT-31 and Saudi Geostationary Satellite 1/Hellas Sat 4 satellites, as scheduled.

After a 42-min flight, GSAT-31 separated from the Ariane 5 upper stage in an elliptical Geosynchronous Transfer Orbit with a perigee (nearest point to Earth) of 250 km and an apogee (farthest point to Earth) of 35,850 km, inclined at an angle of 3.0 degree to the equator.

With a lift-off mass of 2536 kg, GSAT-31 will augment the Ku-band transponder capacity in Geostationary Orbit. The satellite will provide continuity to operational services on some of the in-orbit satellites. GSAT-31 derives its heritage from ISRO’s earlier INSAT/GSAT satellite series.

GSAT-31 has a unique configuration of providing flexible frequency segments and flexible coverage. The satellite will provide communication services to Indian mainland and islands.

ISRO Chairman Dr K Sivan said.

Dr. Sivan also remarked that “GSAT-31 will provide DTH Television Services, connectivity to VSATs for ATM, Stock-exchange, Digital Satellite News Gathering (DSNG) and e-governance applications. The satellite will also be used for bulk data transfer for a host of emerging telecommunication applications.”

According to an official release put out by ISRO, in the days ahead, scientists will undertake phase-wise orbit-raising manoeuvres to place the satellite in Geostationary Orbit (36,000 km above the equator) using its on-board propulsion system.

During the final stages of its orbit raising operations, the antenna reflector of GSAT-31 will be deployed. Following this, the satellite will be put in its final orbital configuration. The satellite will be operational after the successful completion of all in-orbit tests.


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