Now use the desi version of GPS- The IRNSS
Just after 35 years when US launched its Global Positioning System(GPS) 1st satellite, India has started sending satellites for its own version of GPS known as Indian Regional Navigation Satellite System(IRNSS). IRNSS plans to provide real time positioning and timing services in India and region extending up to 1500 km around India. Unlikely to GPS which has more than 30 satellites operational in the space, India plans to send 7 satellites, for its use will be limited to India.
You must be keen to know that what led India to think of its own Positioning System after so many years of using the traditional GPS. The need of IRNSS arouse because access to foreign government-controlled global navigation satellite system is not guaranteed in hostile situations, as happened to the Indian military depending on American GPS during the kargil war.
ISRO opened a new satellite navigation center within the campus of ISRO, Deep Space Network (DSN) at Byalalu, in Karnataka on 28 May 2013. The total cost put into the project is estimated at $212 million. The satellites have been planned to be positions in such a way that they could have continuous radio visibility with Indian control centers.
In the year 2015 the officials explained its advantages over the conventional GPS. The officials recommend an additional hardware in the handheld devices that would receive the S and L band signals from the satellites. These signals are helpful to eliminate disturbances created by atmosphere.
“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.
The precision with which the satellites will determine a location throughout Indian landmass will be better than 10 meters and on Indian ocean it will be around 20 meters.
Completion of the project
After deciding to start such a project in 2010 India launched the first satellite IRNSS-1A on 1st July 2013, followed by 1B on 4th April 2014, 1C on 16 October 2014, ID on 28 March 2015 and the latest one 1E on 20 January 2016. The last two satellites IRNSS-1F and IRNSS-1G are scheduled to be launched on March and April 2016 respectively.