ISRO Plans to Launch IRNSS-1D by March-end, Glitch Not Fixed Yet

The Bangalore-based ISRO team is working round the clock to fix the glitch found in telemetry transmitter of IRNSS-1D so the launch date need not be postponed beyond March.

The faulty transmitter has forced the ISRO team to dismount the fourth prestigious nvaigation satellite from the rocket launcher PSLV-27 on March 4, just four days left for its scheduled launch on March 9.

isro“We are planning to launch the satellite by the end of this month. The replacement transmitter is getting ready and will be brought from our centre in Bangalore,” said M.Y.S. Prasad, director of Satish Dhawan Space Centre from Sriharikota, Andhra Pradesh.

The SDSC is replacing the faulty transmitter in the 1,425 kg Indian Regional Navigation Satellite System (IRNSS-1D). Though this is not the first time a satellite has been dismounted from a rocket, in the past the fault was in launch vehicle and this time it was in transmitter of a satellite on board.

India has so far launched 3 IRNSS satellites and four more are on the anvil but the fourth one would have made India self-reliant for navigation or GPS communications. The delay is also likely to affect the launch of other satellites scheduled within this year at a rapid pace.

The IRNSS-1d satellite, built at Rs.150 crore requires another PSLV-XL version rocket that costs Rs.130 crore to make the launch. The 7 rockets are part of the the Rs.910 crore budget for the project that may go up to Rs.1,400 crore by this year-end.

The IRNSS-1A was launched in July 2013 followed by IRNSS-1B in April 2014 and IRNSS-1C on October 16, 2014. With the launch of IRNSS-1d in March this year, ISRO is planning indigenous platform for its navigation communication requirements.

The latest IRNSS-1D satellite has two payloads — a navigation payload and CDMA ranging payload in addition with a laser retro-reflector and the payload generates navigation signals at L5 and S-band.

The design of the payload makes the IRNSS system inter-operable and compatible with Global Positioning System (GPS). The satellite is powered by two solar arrays, which generate power up to 1,660 watts, and provides the mission a lifespan of 10 years.

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