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Final orbit raising operations of IRNSS-1I successful

Final orbit raising operations of IRNSS-1I successful”

NavIC, also known as Indian Regional Navigation Satellite System (IRNSS), is an independent regional navigation satellite system created to provide position information in the Indian region and 1,500 km around the Indian mainland. It was the 43rd flight of ISRO's workhorse launcher Polar Satellite Launch Vehicle. "The satellite is in good health".

The fourth and the final orbit raising operation of IRNSS-1I was planned at around 2120 hrs on Sunday. Ultimately the satellite will be placed in a Geostationary orbit at 36,000 km height.

Asserting that Indian Space Research Organisation (ISRO) scientists have located GSAT - 6A with which the ground stations lost control 24 hours after it was launched into the orbit on March 29, ISRO Chairman K. Sivan has hoped that contact with the satellite would be re-established soon.

The 1,425 kg navigation satellite IRNSS-1I was launched from the First Launch Pad at Sriharikota on April 12 at 0404 hrs.

The third orbit-raising operation of IRNSS-1I was carried out on Saturday night to achieve a perigee (closest distance to earth) height of 31,426 Km and apogee (farthest distance from earth) height of 35,739 Km, while the second orbit-raising manoeuvre of IRNSS-1I was carried out on Friday night. Each satellite has three rubidium atomic clocks and a total of 27 clocks for the navigation satellite system (including the standby satellites) were supplied by the same vendor.

IRNSS-1I is the latest member of the 'Navigation with Indian Constellation (NavIC)' system. However, the ISRO did not provide any information for how many minutes the satellites' onboard motors were fired for raising the orbit.



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