ISRO to launch first dedicated navigational satellite on 1st July 2013
THE Indian Space Research Organisation (ISRO) will launch the country's first dedicated navigational satellite IRNSS-1A at 2341 hrs on July I from the spaceport of Sriharikota. about 100 km from here. ISRO sources told UNI on Tuesday that the satellite would be launched hv in workhorse launch vehicle PSLV-C22. The IRNSS-IA Spacecraft was mounted on the launch vehicle and the systematic checks were in progress. The T-64 hour countdown for the launch would begin on June 29.
On the reason for fixing the launch lime at 2340 hrs, the sources said "the liming is determined by the specific orbit and the inclination that is required for the spacecraft". The IRNSS-1A would be placed in a sub Geosynchronous Transfer Orbit (sub GTO) with a 284 km perigee (nearest point to Earth) and 20.650 km apogee (farthest point from the earth) with an inclination of 17.86 deg with respect to the equatorial plane. PSLV-C22 is the 24th PSLV Mission of ISRO. The "XL" version of PSLV. with six extended solid strap-on motors, would be used for the mission. This would be the fourth lime
ISRO would be using its XL version of PSLV—the earlier three being PSLV-C11 for the prestigious Chandrayaan-1. PSLV-C17 GSAT-l2 and PSLV-C19RISAT-l missions.
IRNSS-IA, the first Indian Navigation Satellite, was earlier scheduled tor launch on June 12 at 0101 hrs. The satellite has gone through all electrical checks and was ready for propcllant filling.
But during the electrical checks of the launch vehicle, an anomaly was observed in one of the electrohvdraul ic control actuators in the second stage and it was decided to replace the actuator.
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