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ISRO to Launch Fourth Navigation Satellite March 9

March 2, 2015  - By
Image: GPS World

The Indian Space Research Organization (ISRO) is expected to launch IRNSS-1D on March 9, reports The Times of India. IRNSS-1D is the fourth navigation satellite in the Indian Regional Navigational Satellite System, and will make the constellation operable.

The launch is tentatively planned for March 9 around 6:35 p.m. However, final go for the launch will be given by the ISRO’s Launch Authorization Board, which will meet March 6.

IRNSS-1D will be flown into space in the Indian Polar Satellite Launch Vehicle-XL.

The space segment of the IRNSS consists of seven satellites: three  in geostationary orbit and four in inclined geosynchronous orbit. The ground segment consists of infrastructure for controlling, tracking and other facilities. The entire IRNSS constellation of seven satellites is planned to be completed by 2015.

Both IRNSS-1A and 1B are functioning satisfactorily from their designated geosynchronous orbital positions. The first three satellites in the IRNSS series were launched from Sriharikota on July 1, 2013, April 4, 2014, and October 16, 2014. IRNSS-1E and IRNSS-1F satellites are expected to be launched before year end.

IRNSS is an independent regional navigation satellite system designed to provide position information in the Indian region and 1,500 kilometers around the Indian mainland. IRNSS will provide two types of service: Standard Positioning Services (SPS) — provided to all users — and Restricted Services (RS), provided to authorized users.


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