ISRO News and Updates

Discussion in 'Defence & Strategic Issues' started by rahulrds1, Aug 31, 2009.

  1. JAISWAL

    JAISWAL Senior Member Senior Member

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    First full-fledged test of space launchers soon
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    http://idrw.org/?p=6296

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    .Will reduce dependency on Russia for validation

    The Indian Space Research Organisation (ISRO) has achieved a major breakthrough to calibrate and test its launchers, those meant to help escape the earth’s atmosphere and those which help re-enter it.

    This would mean India does not have to depend on Russia for the launchers like it did all these years, thereby reducing loss of time considerably.

    ISRO sources said the first (cold) test, with the wind at room temperature, was conducted about three months ago and the system’s performance was alright. The hot test, with temperatures going all the way up to 1,000 degree Celsius, they said, was pending.

    “It should be conducted in the next four-six months,” a source said.

    The system will be used to test models of the re-usable launch vehicle, which is key to India’s proposed manned mission to space. ISRO has already begun work on a 9x9 metre winged rocket prototype - Re-usable Launch Vehicle Technology Demonstrator (RLV-TD).

    The prototype, considered a critical breakthrough, once completed, will allow the space agency to assess how close it is to developing a fully re-usable Two Stage To Orbit vehicle.

    Sources said that a Horton Spheres System (along with wind tunnels), which creates vacuum enabling calibration of the launchers, has been installed at the Vikram Sarabhai Space Centre (VSSC).

    The System, manufactured by a Bangalore-based firm, comprises three Horton Spheres each with a diameter of 16.3 metre and 2,200 cubic metre capacity.

    It has two parallel pumping trains, each with two mechanical booster pumps with a pumping speed of 30,000 cubic metre per hour, backed successively by booster pumps of 14,000 cubic metre per hour and 7,000 cubic metre per hour and finally by three rotary piston pumps, each with a pumping speed of 1,325 cubic metre per hour.

    Added to this, a complete range of measurement and control instrumentation as well as vacuum valves are part of the system, which boasts of six large capacity heat exchangers to ensure cooling of the high temperature exhaust air from the booster pump.

    “High pressures are created from one side of the tunnel and low pressures operate from the other side in vacuum, creating Mach numbers between 4 to14,” sources said, adding that these are the kind of machs encountered by launch vehicles while leaving or entering the earth’s atmosphere.

    Speaking to Deccan Herald, Nagarjun Sakhamuri, Managing Director of Hind High Vacuum Company Private Limited - the firm that manufactured the Horton Spheres - said, “Earlier, all our launchers were sent to Russia for validation process. But this system enables ISRO to do all the validation here.”

    The system basically simulates the velocity encountered by the launch vehicles, the temperatures they have to deal with, he said.

    “The vehicles are suddenly exposed to shock waves under pressurised conditions and checked for various criteria,” sources said.

    Noting that the system’s accuracy level is 1:5, Sakhamuri said, “Prior to this, ISRO did its tests with miniature models of the launchers and those had an accuracy of 1:50. That is why it had to depend on Russia for validation.”
     
  2. nitesh

    nitesh Mob Control Manager Stars and Ambassadors

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    IIT-B students set up society to study Mars - The Times of India


    Indian Scientists Propose 10 Experiments For 2013 Mission To Mars

     
  3. rahulrds1

    rahulrds1 Regular Member

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    RISAT-1, Radar Imaging Satellite - 1

    source: RISAT-1 to be launched anytime from March 15 - Sci/Tech - DNA

    Indigenously developed remote sensing satellite RISAT-1, which can take images of the Earth in all weather conditions, would be launched by space agency ISRO anytime from March 15.

    The 1850 kg RISAT-1, earlier slated for launch last year onboard PSLV-C19, would be a major milestone for the country and a boon for regions perennially under cloud cover.

    "The launch of microwave remote sensing RISAT-1 is slated anytime from March 15," ISRO Chairman K Radhakrishnan told reporters on the sidelines of an event here organised by the Indian Institute of Science.

    Besides use in the agriculture sector, the satellite's all weather capability to take images of the Earth could also be used to keep an eye on the country's borders round-the-clock and to help in anti-terrorist and anti-infiltration operations, he said.

    The ground testing for GSLV-Mk III, which can lift four tonne spacecraft, was on and its launch would be finalised by May or June this year, Radhakrishnan said.

    On the other future launches, he said communication satellites GSAT-10 and GSAT-7 were scheduled for launch this year.

    GSAT-14 onboard indigenously developed Geosynchronous Satellite Launch Vehicle (GSLV-D5) was also scheduled for launch this year, the ISRO chief said, adding the agency planned for the launch of first regional navigation satellite system in 2012.
     
    Last edited: Jan 18, 2012
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  4. LETHALFORCE

    LETHALFORCE Moderator Moderator

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    Is India making the SAR lenses or is it coming from Israel??
     
  5. JAISWAL

    JAISWAL Senior Member Senior Member

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    most probebly from Israel.
    As India manufacturing of SAR lenses not known.
     
  6. LETHALFORCE

    LETHALFORCE Moderator Moderator

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    This will be a huge boost to India's (weather) surveillance in the region.
     
  7. sayareakd

    sayareakd Moderator Moderator

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    It is our version of SAR satellite, since this was under construction we purchased Israeli SAR satellite, as additional space based radar.
     
  8. Apollyon

    Apollyon Führer Senior Member

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    Last edited: Jan 18, 2012
  9. sayareakd

    sayareakd Moderator Moderator

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    just wonder if it can detect satellites launches and track them, this is the same type of tech which India wanted from Israel after kargil war of 1999.
     
  10. LETHALFORCE

    LETHALFORCE Moderator Moderator

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  11. sayareakd

    sayareakd Moderator Moderator

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    [​IMG]

    this is civilian SAR satellite image, just imagine what military SAR satellite image would be.
     
  12. LETHALFORCE

    LETHALFORCE Moderator Moderator

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    military satellites are rumored to be able to read what brand of cigarette someone on earth is smoking?
     
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  13. KS

    KS Bye bye DFI Veteran Member

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    RISAT II is said to have been from Israel..no surprise if RISAT I also turns out to be from Israelis.

    BTW more than the RISAT launch I'm excited about the GSLV..
     
    Last edited: Jan 18, 2012
  14. tiranga

    tiranga Tihar Jail Banned

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    Yes, I did see some news report on that anyways, I don't remember much abt it, but yeah the entire sat is made by us with the components
     
  15. tiranga

    tiranga Tihar Jail Banned

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    Afaik it's something measured in meters, risat is said to look unto 1 meters which means risat can see pics as clear as some person looking from a metro above the ground, this is one of the highest resolution available, but I think us is now inventing even more precise spy sats
     
  16. tiranga

    tiranga Tihar Jail Banned

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    I am pretty sure it will be used for intelligence as well... Anyways, we are sending a dedicated military sat by next yr or so
     
  17. Param

    Param Senior Member Senior Member

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    No offence :facepalm:
     
  18. Virendra

    Virendra Moderator Moderator

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    Last time they had lost a cryogenic engine in GSLV launch.

    Now we're talking, GSAT-10 is most eagerly awaited by the frustrated Tata Sky people :p
    GSAT-7 is dedicated as Navy's infrastructure for communication and network centric warfare :spy:
    It will network together the Navy's warships, submarines and aircrafts as well as the operational centres ashore, through high-speed data-links. This will detect & share maritime threats in real-time to ensure swift reaction.
    The satellite will cover around 600 x 1,000 nm area of the Indian Ocean Region (IOR), categorised by India as its primary area of responsibility in terms of maritime security.

    Regards,
    Virendra
     
  19. LETHALFORCE

    LETHALFORCE Moderator Moderator

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    Cartosat also is used for intelligence.
     
  20. LETHALFORCE

    LETHALFORCE Moderator Moderator

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    If google earth can give sharp images of streets, imagine military satellites.
     

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