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ISRO launches communication satellite GSAT-7A

The Indian Space Research  Organisation has successfully launched geostationary communication satellite GSAT-7A onboard  Geosynchronous Satellite Launch Vehicle GSLV-F11. The satellite with a mission life of eight years has been built to provide communication capability to the users in Ku-band over the Indian region.

Dec 19, 2018 20:31 IST
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The Indian Space Research  Organisation (ISRO) on December 19, 2018 successfully launched geostationary communication satellite GSAT-7A onboard  Geosynchronous Satellite Launch Vehicle GSLV-F11.

The 26-hour countdown for the launch commenced on December 18 at 2.10 pm and the rocket blasted off at 4.10 pm from the second launch pad at Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh.

Key Highlights

The launch vehicle, GSLV-F11, which is in its 13th flight, will inject GSAT-7A into a Geosynchronous Transfer Orbit (GTO).

The satellite with a mission life of eight years has been built to provide communication capability to the users in Ku-band over the Indian region.

The satellite separated from the rocket after 19 minutes of the launch. It will be placed in its final Geostationary Orbit (GEO) using the onboard propulsion system.

According to ISRO, GSAT-7A will take a few days after separation from the launcher to reach its orbital slot.

GSLV-F11 is ISRO's fourth generation launch vehicle with three stages. The four liquid strap-ons and a solid rocket motor at the core form the first stage.

While the second stage is equipped with a high thrust engine using liquid fuel, the cryogenic upper stage forms the third and final stage of the vehicle.

About GSAT-7A

GSAT-7A is the 35th communication satellite built by ISRO with a Gregorian Antenna and many other advanced new technologies.

Most of the functional requirements of the communication payloads and the other systems have been derived from ISRO’s earlier geostationary INSAT/GSAT satellites.

 ISRO launches communication satellite GSAT-7A

The satellite is also the heaviest one being launched by GSLV with an indigenously developed cryogenic stage. The cryogenic stage of this vehicle has been modified to increase the thrust rate.

Configured ISRO's standard I-2000 Kg (I-2K) Bus, the satellite weighs about 2,250 kg,

Background

On December 5, 2018, India’s next generation high throughput communication satellite, GSAT-11 was successfully launched from the Kourou launch base in French Guiana by Ariane-5 VA-246.

The communication satellite, weighing about 5854 kg, is the heaviest satellite built by ISRO.

The satellite is the fore-runner in the series of advanced communication satellites with multi-spot beam antenna coverage over Indian mainland and Islands.

It is expected to play a vital role in providing broadband services across the country. It will also provide a platform to demonstrate new generation applications.

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