India launches first dedicated navigation satellite

India launches first dedicated navigation satellite


Sriharikota: The Indian Space Research Organisation on Monday successfully launched its first dedicated navigation satellite. The Polar satellite Launch Vehicle blasted off from the Satish Dhawan Space Centre at 11.41pm on Monday night and ejected IRNSS-1A satellite, placing it in orbit a little past midnight, technically on Tuesday.

PSLV - C22 successfully launches India''s first dedicated navigational satellite IRNSS-1A from SDSC SHAR, Sriharikota

Developed by India, IRNSS-1A, the first of the seven satellites constituting the Indian Regional Navigation Satellite System (IRNSS) space segment, has a mission life of 10 years. It is designed to provide accurate position information service to users in the country as well as the region extending up to 1,500 km from its boundary, which is its primary service area.

“IRNSS-1A was launched at a cost of approximately Rs 12.5 billion,” ISRO chairman K Radhakrishnan said after the launch.

Consisting of a space segment and a ground segment, IRNSS has three satellites in geostationary orbit and four satellites in inclined geosynchronous orbit and is to be completed before 2015. Over Rs 30 billion is earmarked for the ground segment and almost all the satellites would cost Rs 12.5 billion, since all of them would most probably be identical, he added.

The launch was “very precise” he said, adding that when the target of apogee was aimed at 20,650 km plus or minus 750 km, the rocket achieved an apogee of 20,625 km.

IRNSS is an independent regional navigation satellite system designed to provide position information in the Indian region and 1500 km around the Indian mainland. IRNSS would provide two types of services, namely, Standard Positioning Services (SPS) – provided to all users – and Restricted Services (RS) provided only to authorised users.

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.

The entire IRNSS constellation of seven satellites is planned to be completed by 2015-16.

Source: ISRO