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ISRO to launch the fifth navigational satellite IRNSS-1E

ISRO to launch the fifth navigational satellite IRNSS-1E on January 20.

The satellite will be propelled into space by ISRO’s workhorse launch vehicle PSLV-C31.

What is Indian Regional Navigation Satellite System?

  • It is an indigenously developed Navigation Satellite System that is used to provide accurate real-time positioning and timing services over India and region extending to 1500 km around India.

  • The fully deployed IRNSS system consists of 3 satellites in GEO orbit(geostationary orbit)and 4 satellites in GSO(geosynchronous orbit) orbit, approximately 36,000 km altitude above earth surface.

Why Indian Regional Navigation Satellite System?

  • The requirement of such a navigation system is driven because access to foreign government-controlled global navigation satellite systems is not guaranteed in hostile situations, as happened to the Indian military depending on American GPS during the Kargil War.

  •  The IRNSS would provide two services:

                              1.The Standard Positioning Service open for civilian use.

                              2.The Restricted Service (an encrypted one) for authorised users (including the military).

  • IRNSS would have seven satellites, out of which four are already placed in orbit.

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