ISRO Project IRNSS : NAVIC

India develops IRNSS (India Regional Navigation Satellite System). It gives an accurate location to the users in the country also region 1500km extend to its boundary. Its service areas is enclosed by rectangle from latitude 30 deg. South to 50 deg. North and longitude 30 deg. East to 130 deg. East.
It provides two types of services one is SPS(Standard Positioning Service) for normal users and RS(Restricted Service) for authorised users.

It's accuracy is less than 20m in primary service area.

IRNSS comprises Eight satellites NAVIC, three satellites are in Geostationary orbit and remaining four are located in Geosynchronous orbit with preferred inclination and equatorial location in two different planes. All satellites are configured identically with l-1k Bus.

The satellites are IRNSS - 1A, which was the first satellite under this mission. It comprises two payloads Navigation payload and Ranging payload. It transmits navigation signals to the users. The navigation payload comprises the Rubidium atomic clock. The payload is operating on L5-band and S-band. It also carries Corner Cube Retro Reflectors for laser Ranging.

IRNSS - 1B, IRNSS - 1C, IRNSS - 1E, IRNSS - 1G and IRNSS - 1L are of same configuration which are the successors of this mission.
IRNSS - 1D and IRNSS - 1F comprises ultra Triple junction solar cells for its power uses, Sun and Stars sensors, gyroscope helps in its orientation. Its propulsion system comprises Liquid Apogee Motor(LAM) and thrusters.
There was also IRNSS - 1H, which was unsuccessful as it was not placed in the right orbit.

The major applications of IRNSS are disaster management, precise timing, mapping, terrestrial navigation for travellers and hikers, terrestrial, marine and aerial navigation, visual and voice navigation, vehicle tracking and many more.

we are happy to use a GPS developed by our own country.
Proud to be an Indian.
Jai Hind.