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ISRO to launch first dedicated navigational satellite on July 1
The Indian Space and Research Organization (ISRO) on July 1 will launch India's first dedicated navigational satellite IRNSS-1A with a 10-year mission life on board PSLV-C22 from the Satish Dhawan Space Centre at nearby Sriharikota. IRNSS-1A is one of seven satellites constituting Indian Regional Navigation Satellite System (IRNSS) space segment.

ISRO spokesman said that the 64-hour count down would start in the early hours on June 29 and the launch is scheduled at 11.41 pm on July 1. He informed that the launch rehearsal is in progress right now and the global checks have been completed successfully, reported Economic Times website.

With navigation and ranging payloads, the satellite will provide accurate positional information to users as well as the whole region extending up to 1500 km from its boundary. IRNSS-1A has already been mounted on an 'XL' version of the launch vehicle, ISRO's 24th mission of a PSLV. ISRO will be using the 'XL' version for the fourth time for the purpose of launch. Prior to this XLs had been used for the launch of Chandrayaan 1 (PSLV-C11), GSAT-12 (PSLV-C17) and RISAT-1 (PSLV-C19).

IRNSS-1A is the first of the seven navigational satellites that ISRO is planning to launch for an independent navigational satellite system. For a smartphone or a vehicle to use the signals and determine the positional fix at least four satellites are required. Between 2014 and 2015 ISRO will launch the outstanding six satellites to build a constellation of seven satellites aimed at helping users to determine their location and time independent from the United States’ (GPS).

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