Services:

IRNSS will provide two types of services, namely, Standard Positioning Service (SPS), which is provided to all the users and Restricted Service (RS), which is an encrypted service provided only to the authorized users.

1A special case of geosynchronous orbit is the geostationary orbit, which is a circular geosynchronous orbit at zero inclination (that is, directly above the equator).

The IRNSS System is expected to provide a position accuracy of better than 20 m in the primary service area.

The navigation centre will also be responsible for time reference, generation of navigation messages and monitoring and control of ground facilities.

The key to global positioning system (GPS)-based navigation support is the time reference to which all ground- based systems and satellite clocks are synchronized. The time reference is generated by the high precision timing facility at the navigation centre, which is equipped with high stability, high precision atomic clocks.

Technologically, IRNSS is expected to provide better signal even for the civilian usages.