| Summary/Abstract |
India is developing an Indian Regional Navigation Satellite System (IRNSS) to provide itself and neighbouring countries with the Position Navigation and Timing (PNT) service. This project is likely to become operational by 2015. Initially, the system will have seven satellites, and the number will later go up to 11. IRNSS will be an independent 7 satellite constellation, built and operated by India with indigenous capability: three in GSO and 4 in non-GSO (inclined 29 degrees with equatorial plane). India has already launched three satellites of their constellation and one thereafter, thus making the initial phase of this system operational.
The IRNSS will provide an absolute position accuracy of approximately 20 metres throughout India, and within a 2,000 km region around it. The system is expected to provide two types of services: one for civilian use, and another as a restricted encrypted service for specific users.
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