After dismounting the 1,425kg IRNSS-1D satellite from the PSLV-27 rocket, ISRO scientists are pondering the ways to fix the problem transmitter to set right the glitch with minimum dismantling possible.
The satellite was set for launch on March 9 evening by the Polar Satellite Launch Vehicle-27 (PSLV-XL) but the glitch in its telemetry transmitter has delayed the schedule further.
“We are assessing how the correction work could be carried out with minimum efforts so that the satellite could be launched early,” an ISRO official told IANS. Unless the method to rectify is identified, the time for setting it right will be known, he revealed. Until then, the launch timing cannot be announced.
Though, this is not the first time a satellite has been dismounted from the launch vehicle, a defective telemetry transmitter was found for the first time to have given way to delay the launch.
Earlier launches of IRNSS series were carried out without any major problem or delay. India has so far launched 3 navigational satellites as part of a constellation of 7 satellites to provide GPS service to both government and private users, extending up to an area of 1,500km.
Though the full system comprises 9 satellites – 7 in orbit and 2 on the ground as stand -by – the navigation services could be made operational with 4 satellites, according to ISRO.
Built at a cost of Rs.150 crore, the PSLV-XL version rocket at around Rs.130 crore, all the 7 rockets would involve a budget of around Rs.910 crore.