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ISRO's launch of navigation satellite fails

ISRO's launch of navigation satellite fails

The 1,425 kg Indian Regional Navigation Satellite-1H (IRNSS-1H), which was launched from the Satish Dhawan Space Centre at 7 pm on board the highly-reliable and versatile PSLV, was declared unsuccessful after its heat shield failed to separate.

Describing the failed mission as a "mishap", ISRO Chairman Kiran Kumar said the heat shield did not separate for the IRNSS-1H, a backup navigation satellite, to be put into orbit in the final leg of the launch sequence.

India's workhorse Polar Satellite Launch Vehicle (PSLV) failed to launch the IRNSS H satellite on 31st August - its first in-flight failure since 1997.

"Today the launch mission has not succeeded".

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What is a heat shield? . "We have to analyse the heat shield separation command and subsequent commands", he said. Once a satellite is placed into orbit, it is expected to separate and fall off.

IRNSS-1H satellite can not be used as it was enclosed within the heat shield. The malfunctioning satellite's three rubidium atomic clocks had stopped functioning, rendering it ineffective in its objective. Since then, four other clocks on other system components have also malfunctioned, hence the decision to launch IRNSS H, one of the four back-up satellites ordered by ISRO in early 2016.

India is aiming to build its own global positioning system like the United States' GPS, Russia's GLONASS, Europe's Galileo and China's Beidou systems. Until Thursday, it has recorded 39 consecutive successful launches.