Congrats ISRO

Another Milestone for ISRO. ISRO’s recent mission has been accomplished by its successful launch of PSLV C17 with GSAT 12 satellite.

Polar Satellite Launch Vehicle – PSLV

The Polar Satellite Launch Vehicle,usually known by its abbreviation PSLV is the first operational launch vehicle of ISRO. PSLV is capable of launching 1600 kg satellites in 620 km sun-synchronous polar orbit and 1050 kg satellite in geo-synchronous transfer orbit. In the standard configuration, it measures 44.4 m tall, with a lift off weight of 295 tonnes. PSLV has four stages using solid and liquid propulsion systems alternately. The first stage is one of the largest solid propellant boosters in the world and carries 139 tonnes of propellant. A cluster of six strap-ons attached to the first stage motor, four of which are ignited on the ground and two are air-lit.

The reliability rate of PSLV has been superb. There had been 17 continuously successful flights of PSLV, till April 2011(The first launch on September 20, 1993 was unsuccessful). With its variant configurations, PSLV has proved its multi-payload, multi-mission capability in a single launch and its geosynchronous launch capability. In the recent Chandrayaan-mission, another variant of PSLV with an extended version of strap-on motors, PSOM-XL, the payload haul was enhanced to 1750 kg in 620 km SSPO. PSLV has rightfully earned the status of workhorse launch vehicle of ISRO.

Geo-stationary Satellites

The Indian National Satellite (INSAT) system which are placed in Geo-stationary orbits is one of the largest domestic communication satellite systems in Asia-Pacific region. Established in 1983 with commissioning of INSAT-1B, it initiated a major revolution in India’s communications sector and sustained the same later. INSAT space segment consists of 24 satellites out of which 9 are in service (INSAT-2E, INSAT-3A, INSAT-4B, INSAT-3C, INSAT-3E, KALPANA-1, GSAT-2, INSAT-4A and INSAT-4CR )

The system with a total of nearly 200 transponders in the C, Extended C and Ku-bands.provides services to telecommunications, television broadcasting, weather forecasting, disaster warning and Search and Rescue operations.


GSAT-12 is communication satellite developed by the Indian Space Research Organisation, as part of INSAT system. GSAT-12 was successfully launched on July 15th , 2011 4.48 PM. The satellite was injected by PSLV-C17 in the elliptical transfer Orbit of 284 km perigee and an apogee of 21,000 km . The launch took place from Satish Dhawan Space Centre in Sriharikota.GSAT-12 is considered to be a replacement of the aged satellite INSAT-3B and provide services like tele-medicine, point of sale transactions and satellite internet access.

Get more details from HERE.

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