About PSLV and GSLV

Sulekha Rani.R, P.G.T Chemistry , KV NTPC Kayamkulam

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. 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.

Typical Parameters of PSLV
Lift-off weight	295 tonne
Pay Load	1600 kg in to 620 km Polar Orbit, 1060 kg in to Geosynchronous Transfer Orbit (GTO)
Height	44 metre

PSLV Milestones

PSLV-C16 launched RESOURCESAT - 2, YOUTHSAT and X-SAT on April 20, 2011 (Successful) PSLV-C15 launched CARTOSAT-2B, ALSAT-2A, NLS 6.1 & 6.2 and STUDSAT on July 12, 2010 (Successful) PSLV-C14 launched Oceansat - 2 and Six Nanosatellites on September 23, 2009 (Successful) PSLV-C12 launched RISAT-2 and ANUSAT on April 20, 2009 (Successfully) PSLV-C11 launched CHANDRAYAAN-I, on October 22, 2008 (Successful) PSLV-C9 launched CARTOSAT-2A, IMS-1 and Eight nano-satellites on April 28, 2008 (Successful) PSLV-C10 launched TECSAR on January 23, 2008 (Successful) PSLV-C8 launched AGILE on April 23, 2007 (Successful) PSLV-C7 launched CARTOSAT-2, SRE-1, LAPAN-TUBSAT and PEHUENSAT-1 on January 10, 2007 (Successful) PSLV-C6 launched CARTOSAT-1 and HAMSAT on May 5, 2005 (Successful) PSLV-C5 launched RESOURCESAT-1(IRS-P6) on October 17, 2003 (Successful) PSLV-C4 launched KALPANA-1(METSAT) on September 12, 2002 (Successful) PSLV-C3 launched TES on October 22, 2001 (Successful) PSLV-C2 launched OCEANSAT(IRS-P4), KITSAT-3 and DLR-TUBSAT on May 26, 1999 (Successful) PSLV-C1 launched IRS-1D on September 29, 1997 (Successful) PSLV-D3 launched IRS-P3 on March 21, 1996 (Successful) PSLV-D2 launched IRS-P2 on October 15, 1994 (Successful) PSLV-D1 launched IRS-1E on September 20, 1993 (Unsuccessful)

GSLV

Geosynchronous Satellite Launch Vehicle(GSLV)-Mark I&II ,is capable of placing INSAT–II class of satellites (2000 – 2,500 kg) into Geosynchronous Transfer Orbit (GTO). GSLV is a three stage vehicle GSLV is 49 m tall, with 414 t lift off weight. It has a maximum diameter of 3.4 m at the payload fairing. First stage comprises S125 solid booster with four liquid (L40) strap-ons. Second stage (GS2) is liquid engine and the third stage (GS3) is a cryo stage. The vehicle develops a lift off thrust of 6573 kn. The first flight of GSLV took place from SHAR on April 18, 2001 by launching 1540 kg GSAT-1. It was followed by six more launches , GSLV-D2 on May 8, 2003 (GSAT-2 1825 kg), GSLV-F01 on September 20, 2004 (EDUSAT 1950 kg), GSLV-F02 on July 10, 2006, GSLV-F04 on September 2, 2007 (INSAT-4CR 2130 kg), GSLV-D3 on April 15, 2010 and GSLV-F06 on December 25, 2010. Typical Parameters of GSLV Lift-off weight 414 tonne Pay Load 2 to 2.5 Tonne in to Geosynchronous Transfer Orbit (GTO) Height 49 metre GSLV Milestones GSLV-F06 launched GSAT-5P on December 25, 2010 (Unsuccessful) GSLV-D3 launched GSAT-4 on April 15, 2010 (Unsuccessful) GSLV-F04 launched INSAT-4CR on September 2, 2007 (Successful) GSLV-F02 launched INSAT-4C on July 10, 2006 (Unsuccessful) GSLV-F01 launched EDUSAT(GSAT-3) on September 20, 2004 (Successful) GSLV-D2 launched GSAT-2 on May 8, 2003 (Successful) GSLV-D1 launched GSAT-1 on April 18, 2001 (Successful)