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According to Isro, the expected orbital parameters are perigee (the nearest point to earth) altitude at 11,668 km, apogee (the farthest point to earth) altitude at 35,924 km and inclination at seven degrees. Isro had launched IRNSS-1B on April 4. It was lunched on Polar Satellite Launching Vehicle (PSLV)-C24 from the space station at Sriharikota. The ‘XL’ configuration of PSLV was used for this mission, which was used five times to launch Chandrayaan-1, GSAT-12, RISAT-1, IRNSS-1A and Mars Orbiter Spacecraft.
IRNSS-1B is the second of the seven satellites constituting the space segment of the regional navigation satellite system. IRNSS-1A, the first satellite of the constellation, was successfully launched by PSLV on July 2, 2013. IRNSS-1A is functioning satisfactorily from its designated geosynchronous orbital position.
IRNSS is an independent regional navigation satellite system designed to provide position information in the Indian region and 1,500 km around the Indian mainland. IRNSS would provide two types of services -- standard positioning services (SPS) and restricted services (RS). A number of ground stations responsible for the generation and transmission of navigation parameters, satellite control, satellite ranging and monitoring, etc., have been established in as many as 15 locations across the country.
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