Failure of INSAT-4C has dashed the hopes of various DTH operators. The accident has left a “black mark” on the capability of ISRO’s scientists. This mishap occurred on July 10, when GSLV-F02, the satellite launcher carrying INSAT-4C, had to be destroyed from the control room. The launch vehicle, carrying 2,168 kg satellite, deviated from it chartered path, soon after lift-off from Satish Dhawan Space Centre (SDSC). One of the four strap-on motors, having hypergolic liquid propellants, failed to provide the required thrust during the premiere stage. It is because of this, the satellite drifted to one side.
The satellite was the heaviest in its range and the launch vehicle was 49-metre-tall, with a 414 tonne GSLV three-stage vehicle. The first stage, GS1, comprised a core motor with 138 tonne of solid propellants and four strap-on motors, each with 42 tonnes of hypergolic liquid propellant. If successful, the life-span of this satellite was expected to be 10 years.