Fourth IRNSS satellite to be launched soon
He said the Indian Space Research Organisation (ISRO) is setting up Indian Regional Navigation Satellite System (IRNSS) to provide positioning and navigational services in Indian mainland and surrounding region up to 1500 Km.
IRNSS consists of seven satellites in a constellation, three satellites in geostationary orbit and four satellites in geosynchronous orbit.
The objective of IRNSS is to provide positioning services over Indian region with an absolute position accuracy of better than 20 metres. IRNSS provides two services namely Standard Positioning Service (SPS) for Civilian users and Restricted Service (RS) for strategic users, Singh said.
Out of the 7 satellites required in the constellation, three satellites- IRNSS-1A, 1B & 1C have already been successfully placed in the orbit. The fourth satellite IRNSS-1D is scheduled for launch during March 2015. The work on remaining three satellites is in progress, he said.
The associated ground segment for maintaining the satellites in orbit, monitoring the constellation status, correction of the orbital parameters and navigation data uploading is in place, the minister added.
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