PSLV-C39 flight carrying navigation satellite IRNSS-1H fails

New Delhi, August 31, 2017

PSLV-C39 carrying IRNSS-1H navigation satellite unsuccessful
India's workhorse Polar Satellite Launch Vehicle's 41st flight, aimed at placing navigation satellite IRNSS-1H into a Sub-Geosynchronous Transfer Orbit (Sub-GTO), from the Satish Dhawan Space Centre (SDSC) at Sriharikota in Andhra Pradesh, on the east coast, was unsuccessful this evening.
"PSLV-C39 had a normal lift-off at 1900 hrs IST  (7:00 pm) and all the flight events took place exactly as planned, except heat shield separation.  This resulted in satellite separation occurring within the heat shield," a press release from Indian Space Research Organization (ISRO) said.
"The satellite is inside the heat shield resulting in the unsuccessful mission. Detailed analysis is under progress to identify the cause of the anomaly in the heat shield separation event," the release added.
The launch was scheduled for 1859 hours today. The 29-hour countdown for the launch started at 1400 hours yesterday.
PSLV is India's third generation launch vehicle. After the failed first mission, it had 39 consecutive successful launches between October 1994 and June this year. It has launched 48 Indian satellits and 209 satellites for foreign customers. Its successes include Chandrayaan-1, India's lunar mission in 2008, and Mars Orbiter Spacecraft in 2013.
As in the previous six launches of IRNSS satellites, PSLV-C39 used the ‘XL’ version of PSLV equipped with six strap-ons, each carrying 12 tons of propellant.
IRNSS-1H was meant to be the eighth satellite of the Indian Regional Navigation Satellite System (IRNSS). 
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