The Indian Regional Navigation Satellite System IRNSS is an indigenously developed Navigation Satellite System. The fully deployed IRNSS system consists of 3 satellites in GEO orbit and 4 satellites in GSO orbit.

It is used to provide accurate real-time positioning and timing services over India and region extending to 1500 km around India.

The full system comprises nine satellites, including two on the ground as stand-by.

IRNSS would have seven satellites, out of which six are already placed in orbit.

The constellation of seven satellites is expected to operate from June 2016 onwards

Constellation size-

Total satellites 7
Satellites in orbit 6
First launch 1 July 2013
Last launch 10 March 2016 4:01 PM IST
Total launches 6
Orbital characteristics-
Regime(s) High Earth
Orbital height 36,000 km (22,000 mi)[1]
Other details-
Cost $212 million

Some applications of IRNSS are:

Integration with mobile phones
Precise Timing
Mapping and Geodetic data capture
Terrestrial navigation aid for hikers and travellers
Visual and voice navigation for drivers
Terrestrial, Aerial and Marine Navigation
Disaster Management
Vehicle tracking and fleet management