India's All Set to its own IRNSS Navigation System
IRNSS is ISRO's initiative to build an independent satellite navigation system to provide precise position, velocity and time to the users of Indian region. The system is designed with a constellation of seven spacecraft and a vast network of ground systems.
With the addition of fourth spacecraft IRNSS-1D in March 2015, the minimum satellite requirement is met and independent positioning is now possible for the first time using an Indian satellite-based navigation system.
"All seven satellites of the Indian Regional Navigation Satellite System (IRNSS), will be in orbit by March 2016" ISRO Chairman A S Kiran said in Thiruvananthapuram on thursday.
The IRNSS constellation has seven satellites in all and four are already in orbit. Kumar said the three remaining IRNSS satellites IRNSS 1E, 1F and 1G - will be launched in January, February and March respectively.
ISRO feels that seven IRNSS constellation satellites once operational by July next year will be significantly more accurate than the American GPS system. Unlike American GPS, ISRO is recommending a small additional hardware in handheld devices that can receive S-Band signals from IRNSS satellites and inclusion of a code in the phone software to receive L-Band signals.
"Both these L and S-band signals received from seven satellite constellation of the IRNSS are being calculated by a special embedded software which reduces the errors caused by atmospheric disturbances significantly. This, in turn, gives a superior quality location accuracy than the American GPS system," says a senior Isro official.
Kumar said ISRO would launch six satellites for Singapore in December and added that the Chandrayan 2 mission would be in 2018.
"ISRO is well equipped to meet the challenges in space sector," he said.
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