The Geosynchronous Satellite Launch Vehicle was primarily developed to launch INSAT/GSAT class of satellites into Geosynchronous Transfer Orbits. GSLV is being used for launching GSAT series of satellites. GSLV is a three stage launcher with a 139 tonnes solid booster and four 40 tonnes liquid strap-ons as first stage. Second stage is a 37.5 tonnes liquid stage. The third stage is 12.5 tonnes indigenous cryogenic upper stage(CUS). The most recent flight of GSLV, the GSLV-D6, placed GSAT-6 into its planned orbit and marked the second successful flight of the indigenous cryogenic stage. Earlier, GSLV had launched various communication satellites among which EDUSAT is notable, being India's first satellite built exclusively to serve the educational sector through satellite based distance education.
|Height :||49.13 m|
|Number Of Stages :||3|
|Lift Off Mass :||415 tonnes|
|First Flight :||April 18, 2001|
|Payload to GTO : 2,500 Kg||
GSLV's primary payloads are INSAT/GSAT class of communication satellites that operate from Geostationary orbits and hence are placed in Geosynchronous Transfer Orbits by GSLV.
|Payload to LEO : 5,000 Kg||
Further, GSLV's capability of placing up to 5 tonnes in Low Earth Orbits broadens the scope of payloads from heavy satellites to multiple smaller satellites.
|Third Stage : CUS||
Developed under the Cryogenic Upper Stage Project (CUSP), the CUS-12.5 is India's present cryogenic engine, developed by the Liquid Propulsion Systems Centre. CUS-12.5 has a staged combustion operating cycle.
|Second Stage : GS2||
One Vikas engine is used in the second stage of GSLV. The stage was derived from the PS2 of PSLV where the Vikas engine has proved its reliability.
|First Stage : GS1||
The first stage of GSLV was also derived from the PSLV's PS1. The 139 tonne solid rocket motor is augmented by 4 liquid strap-ons.
The four liquid engine strap-ons used in GSLV are heavier derivatives of PSLV's PS2, and use one Vikas engine each.
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