Fourth INDIAN Navigational Satellite Going to launch on March 9..........


India will move closer to its own satellite navigation system with the launch of its fourth satellite tentatively slated for March 9, "The launch is tentatively planned for March 9 evening around 6.35pm IST. However final green signal for the launch will be given days ahead of the satellite launch,".

  • The LAB meeting is slated for March 6.
  • The 59-hour countdown is expected to begin on March 7 morning.
  • Weighing 1,425kgs,
  •  the fourth of the Indian Regional Navigation Satellite System (IRNSS) satellite-IRNSS-1D would be flown into space in an Indian rocket called Polar Satellite Launch Vehicle-XL.
  • After its successful launch and commissioning IRNSS-ID is expected to make India among select group of countries having its own satellite navigation system.
  • The satellite has a life span of around 10 years.


Currently India is knocking at the door step of an exclusive space club - navigation satellite system owing club - that has the US, Russia, China and Japan as members.Though the full system comprises of nine satellites - seven in orbit and two on the ground as stand-by - the navigation services could be made operational with four satellites, ISRO officials had said earlier.

total cost...........Each satellite costs around Rs. 150 crores and the PSLV-XL version rocket would cost around Rs. 130 crores. The seven rockets would involve an outlay of around Rs. 910 crores.

The entire IRNSS constellation of seven satellites is planned to be completed by 2015.

The first satellite IRNSS-1A was launched in July 2013, the second IRNSS-1B in April 2014 and the third one in October 16, 2014.Once the regional navigation system is in place, India need not be dependent on others.

services provided by IRNSS.......The IRNSS will provide two types of services - standard positioning service and restricted service. The former is provided to all users and the latter is an encrypted service for authorised users.

The IRNSS system comprises of two segments - the space and the ground. The space segment consists of seven satellites of which three will be in geostationary orbit and four in inclined geosynchronous orbit.

The ground segment consists of infrastructure for controlling, tracking and other facilities.

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