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Indian Regional Navigation Satellite system (IRNSS)

Indian Regional Navigation Satellite system (IRNSS)

  • The Indian Regional Navigation Satellite System (IRNSS) is an autonomous regional satellite navigation system being developed by the ISRO which would be under complete control of the Indian government.
  • The requirement of such a navigation system is driven by the fact that access to foreign government-controlled global navigation satellite systems is not guaranteed in hostile situations, as happened to Indian military depending on American GPS during Kargil War.

The IRNSS would provide two services :,

  • the Standard Positioning Service open for civilian use and
  • the Restricted Service, encrypted one, for authorised users (military)
  • As part of the project, ISRO opened a new satellite navigation centre within the campus of ISRO Deep Space Network (DSN) at Byalalu near Bangalore in Karnataka on 28 May 2013.
  • A goal of complete Indian control has been stated, with the space segment, ground segment and user receivers all being built in India. The total cost of the project is expected to be Z1420 crore.
  • Seven satellites with the prefix “IRNSS-1” will constitute the space segment of the IRNSS. IRNSS-1A, the first of the seven satellites of the IRNSS constellation, was launched on 1 July 2013.
  • Indian Regional Navigation Satellite system (IRNSS)-1B was launched on 4 April 2014 on board the PSLV­-C24 rocket. The satellite has been placed in geosynchronous orbit. IRNSS-1C was launched on 16 October 2014.
  • The satellite payloads would consist of atomic clocks and electronic equipment to generate the navigation signals. IRNSS signals will consist of a Special Positioning Service and a Precision Service.
  • Both will be carried on L5 and S band. The system is intended to provide an absolute position accuracy of better than 10 meters throughout Indian landmass and better than 20 meters in the Indian Ocean as well as a region extending approximately 1,500 km around India.
  • The ground segment of IRNSS constellation would consist of a Master Control Centre (MCC), ground stations to track and estimate the satellites’ orbits and ensure the integrity of the network (IRIM), and additional ground stations to monitor the health of the satellites with the capability of issuing radio commands to the satellites.
  • The MCC would estimate and predict the position of all IRNSS satellites, calculate integrity, makes necessary ionospheric and clock corrections and run the navigation software. In pursuit of a highly independent system, an Indian standard time infrastructure would also be established.
Satellite Flight Launch Time
IRNSS-1A PSLV-C22 1 July 2013
IRNSS-1B PSLV-C24 4 April 2014
IRNSS-1C PSLV-C26 15 October 2014
IRNSS-1D PSLV-C27 (Planned) December                  2014




  March 2015 (Tentative)


  2015 (Tentative)


  2015 (Tentative)

Indian Regional Navigation Satellite system (IRNSS)




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