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Tag: SDSC

  • Space capsule recovered

    Space capsule recovered

    MUMBAI: The Space capsule Recovery Experiment (SRE-1) that was launched by Polar Satellite Launch Vehicle (PSLV-C7) from Satish Dhawan Space Centre (SDSC) SHAR Sriharikota on 10 January, was successfully recovered today after being maneuvered to reenter the earth’s atmosphere and descend over Bay of Bengal about 140 km East of Sriharikota.

    Since its launch, SRE-1 was going round the earth in a circular polar orbit at an altitude of 637 km. In preparation for its reentry, SRE-1 was put into an elliptical orbit with a perigee (nearest point to earth) of 485 km and an apogee (farthest point to earth) of 639 km by issuing commands from the Spacecraft Control Centre (SCC) of ISTRAC at Bangalore on January 19, 2007. The critical de-boost operations were executed from SCC, Bangalore supported by a network of ground stations at Bangalore, Lucknow, Mauritius, Sriharikota, Biak in Indonesia, Saskatoon in Canada, Svalbard in Norway besides shipborne and airborne terminals.

    The recovery operations were supported and carried out by the Indian Coast Guard and Indian Navy using ships, aircraft and helicopters.

    During its stay in orbit for the last 12 days, the two experiments on board SRE-1 were successfully conducted under micro gravity conditions. One of the experiments was related to study of metal melting and crystallizations under micro gravity conditions. The second experiment, designed by National Metallurgical Laboratory, Jamshedpur, was intended to study the synthesis of nano-crystals under micro gravity conditions. This experiment can help in designing better biomaterials having closest proximity with natural biological products. The experimental results will be analysed in due
    course by the principal scientific investigators of the two experiments.

    The successful launch, in-orbit operation of the on board experiments and reentry and recovery of SRE-1 has demonstrated India’s capability in important technologies like aero-thermo structures, deceleration and flotation systems, navigation, guidance and control. SRE-1 is an important
    beginning for providing a low cost platform for micro-gravity experiments in space science and technology and return specimen from space.

  • Isro to launch Insat-4C replacement by July 2007

    Isro to launch Insat-4C replacement by July 2007

    MUMBAI: Soon after the failure of the GSLV-F02 launch rocket carrying the Insat-4C communication satellite, the Indian Space Research Organisation (Isro) has decided to act fast to meet the growing need for Ku-band transponders from the direct-to-home (DTH) sector.

    Isro will be replacing Insat-4C, where Kalanithi Maran’s Sun Direct had booked seven high-power Ku-band transponders, with the launch of an identical satellite by July 2007. The satellite, Insat-4C(R), will be launched at the Satish Dhawan Space Centre (SDSC) SHAR, Sriharikota.

    Maran will have the option to take transponder space on that satellite for his DTH venture. But if he decides to launch the service earlier, Isro will make provisions on an alternate satellite which could be foreign or Indian. Insat-4B, which is meant for Doordarshan’s DTH service DD Direct Plus, is being launched early next year.

    “We have the flexibility to accommodate Sun. If there is an early requirement, we can give them space on an Indian or foreign satellite,” says Isro contract management and legal services director SB Iyer. For DTH providers who want to operate from foreign satellites, Isro will have to provide the approval and lease it out for them.

    Will Insat-4C(R) disturb the scheduling of Isro’s other satellite launches? “We plan to launch Insat-4C(R) by July 2007 from Sriharikota. It will have the same number of transponders as Insat-4C. The other satellite launches will be on schedule,” says Iyer.

    Of the 12 Ku-band transponders Insat-4C would have carried, Sun TV had booked six for DTH and one for DSNG (digital satellite news gathering). While Isro plans to launch Insat-4D in 2006-07, Insat-4E is expected to go up by 2007-08.

    Isro had earlier said that the failure of Insat-4C was “a brief setback” which it would correct by recasting its programmes to accelerate the Ku-band capacity growth.