ISRO Fixes Glitch, to Mount Satellite on PSLV-27 This week, Launch in March End

The glitch in India’s navigation satellite IRNSS-1D that delayed its launch necessitating dismounting of the satellite from the launch vehicle at Satish Dhawan Space Centre in Sriharikota, Andhra Pradesh, has been fixed.

The Indian space agency is now planning to mount the load back on the PSLV-27 on March 19 and go for pre-launch procedure again.

Representational Photo: IRNSS-1C was the last navigation satellite launched and the current 1D is crucial for India to become self-sufficient in navigation positioning system of its own. (Photo: ISRO)

“The new transmitter is expected to be fixed in the satellite and tested. Then the fully assembled satellite will be mated with the rocket,” M.Y.S. Prasad, director of Satish Dhawan Space Centre (SDSC) told IANS over phone.

The transmitter sent from ISRO Satellite Centre, Bangalore has reached SDSC on Sunday and it may take another week to mate the satellite with the rocket. The next phase of full system check would be carried out next week and then the rocket launch date will be decided. Prasad hinted that it would be around March 29.

The 1,425 kg Indian Regional Navigation Satellite System (IRNSS-1D) was earlier scheduled for launch on March 9 by the Polar Satellite Launch Vehicle (PSLV-XL) but it was deferred at the last minute after it was found that one of the telemetry transmitters in the satellite was not working properly.

It is the first time in ISRO’s history that a satellite had to be dismounted from a rocket due to a minor problem in a transmitter. In the past, satellites have been dismounted but due to other problems.

ISRO said in a statement: “During the integrated electrical checks of Launch Vehicle along with Satellite after the closure of heat shield on March 03, 2015, an anomaly was observed in one of the telemetry transmitters of the Satellite. In order to resolve the technical anomaly through further test, simulation and analysis, the launch of PSLV-C27 with IRNSS-1D has been postponed.” Now, the space agency would resume the launch preparations in full swing again.

The fourth IRNSS-1D is critical for the country’s navigation (GPS) system as it completes the cycle of own navigation by India without depending on other parties. Moreover, with this successful launch, India will join the ranks of US, Russia, China and Japan in the world with their own navigation satellites. (With inputs from IANS)


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