What is PSLV AND GSLV

Polar Satellite Launch Vehicle

The four stages PSLV is capable of launching up to 1,600 kg satellites into a 620 km polar orbit. It has provision to launch payloads from 100 kg micro-satellites or mini or small satellites in different combinations. It can also launch one-ton class payloads into Geosynchronous Transfer Orbit (GTO). So far, it has performed nine missions with eight consecutive successes. The latest launch of PSLV (PSLV-C6) was on 5 May 2005 during which the vehicle precisely placed the 1560 kg CARTOSAT-1 and the 42 kg HAMSAT into a 620 km high polar SSO.

Geosynchronous Satellite Launch Vehicle

The GSLV was successful on its very first test flight. After its successful second flight on 8 May 2003, it was commissioned. This was followed by the success of its third flight on 20 September 2004. The GSLV is capable of launching 2,000 kg class satellites into Geosynchronous Transfer Orbit (GTO). The development of Indigenous cryogenic stage to be used as the third stage of GSLV made further progress during the year. The cryogenic engine which forms part of this stage has already been successfully qualified. GSLV-Mk III, a new version of GSLV and capable of launching spacecraft weighing up to 4 tones to GTO is under development.