Difference between PSLV and GSLV

What is PSLV?

PSLV  is used to deliver various Low Earth Orbits satellites designed primarily to deliver the 600-900 km altitude "earth-observation" or "remote-sensing" satellites with a lift-off mass of up to approximately 1750 kg to Sun-Synchronous circular polar orbits.

What is GSLV?

The primary payloads of GSLV are INSAT-class communication satellites (about 2,500 kg mass) operating from geostationary orbits (about 36,000 km) and are thus placed in GSLV's Geosynchronous Transfer Orbits.

Let us have a deep insight into the difference between comparison between them and a certain difference between them. 

Difference : 
  • An advanced version of the GSLV, called Mk-III, that will be capable of putting very heavy satellites up to about 4,000 kg into space is still under development while the PSLV can carry satellites weighing up to approximately 1,500 kg.
  • PSLV is used for research purposes like agriculture, weather forecasting etc and GSLV is used for domestic purposes like communication, telecasting etc.
  • PSLV's average building cost is about Rs 120 crore. The heaviest version of PSLV, the XL, cost Rs 145 crore while according to information provided by the Space Department, GSLV costs Rs 173 crore.
  • The PSLV is older than the GSLV.
  • The PSLV is more reliable than the GSLV.
  • The GSLV has three phases, whereas the PSLV has four phases.
  • The GSLV uses cryogenic fuel while the PSLV doesn’t use cryogenic fuel.
  • Polar Satellite Launch Vehicle is used to place the satellite perpendicular to the direction of rotation of earth inclined to 90 degrees or some another angle depends on the purpose but GSLV-Geosynchronous A satellite Launch Vehicle is used to place the satellite in the equator to rotate along the direction of rotation of the earth.

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