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ISRO to launch first of the seven IRNSS satellite in June

Shri K Radhakrishnan, Chairman, ISRO
Shri K Radhakrishnan, Chairman, ISRO

Bengaluru: India will launch in June the first of the seven Indian Regional Navigation Satellite System (IRNSS) into the earth orbit to provide real-time position, navigation and time services to multiple users, the space agency chief said on Saturday.

The IRNSS-1 will be launched on board the polar satellite launch vehicle ( PSLV-C22) from the spaceport at Sriharikota off the Bay of Bengal on Andhra Pradesh coast, about 90km northeast of Chennai.

The space agency plans to launch the second navigation satellite three months after in-orbit tests of the first one and the remaining five satellites over a 14-month period by 2014-15.

The IRNSS will have a space segment (constellation of satellites and signal-in-space), a ground segment and a user segment to provide multiple services on 24×7 basis under all-weather conditions to a host of users, including airlines, ships and observational posts.

“We are preparing to launch the first of the navigation satellites constellation in June to provide position accuracy better than 10 metres over India and the region extending up to 1,500km around the subcontinent,” said state-run Indian Space Research Organisation ( ISRO) chairman K Radhakrishnan.

“Three satellites will be placed in the geostationary equatorial orbit (GEO) at 34, 83 and 131.5 degree east and two satellites each in the geosynchronous orbit (GSO) with equator crossing at 55 and 111.5 degree east at an inclination of 29 degree,” Radhakrishnan added.

“The constellation system provides two basic services — standard positioning service for civilian users and restricted service for authorized users. The navigation software is being indigenously at the satellite centre in Bangalore,” Radhakrishnan said.

The navigation system will have two signals in L5 and S-band on 1176.45MHz frequency and 2492.028MHz frequency with provision for downlinks.

Source: http://articles.timesofindia.indiatimes.com/2013-03-16/science/37766259_1_navigation-satellite-geostationary-geosynchronous-orbit



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