IRNSSIndian Regional Navigational Satellite System
IRNSSInternet Resource Name Search Service
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Self reliance in the strategically important area of position related information will be achieved with the use of indigenously built constellation of seven IRNSS satellites and a network of required ground segment.
The IRNSS will provide two services, with the Standard Positioning Service open for civilian use and Restricted Service, an encrypted one, for military use.
While the ISRO is silent on the navigation system's strategic application, it is clear that the IRNSS will be used for defence purposes as well.
India's equivalent of the GPS will be called the Indian Regional Navigational Satellite System or IRNSS, a cluster of seven satellites being developed by the Indian Space Research Organisation ( ISRO) -- IRNSS- 1A, IRNSS- 1B, IRNSS- 1C, IRNSS- 1D, IRNSS- 1E, IRNSS- 1F and IRNSS- 1G.
By launching the IRNSS, India will join China and Europe in the mission to create their own version of the American GPS.
In the framework of the IRNSS program, each satellite will have four SpectraTime Rubidium atomic clocks on board to reach a stability of less than 10 billionths of a second per day.
Once completed, the IRNSS system will offer navigational services, for both civilian and defense purposes, in India and also 1,500 km beyond its borders.
For more details about the IRNSS satellite, PSLV launch vehicle, (http://www.
Speaking at a users' conference on global navigation satellite systems on Thursday, Kumar said the IRNSS would provide self-dependence in the strategically key field of position-related information.
On other post-Mars Orbiter Mission projects of ISRO, he said the launching of PSLV-C26, which would carry IRNSS 1C satellite, had been scheduled on October 10.
IRNSS comprises of a space segment and a ground segment - seven satellites, three in geostationary orbit and four in inclined geosynchronous orbit, in the space segment.
The IRNSS -1A, which is expected to be launched from a home-grown rocket, PSLV-C22 XL, will provide terrestrial, aerial and marine navigation services and will help in disaster and fleet management.