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ISRO News & Discussions

Discussion in 'Education & Research' started by Varad, Apr 17, 2011.

  1. Nilgiri

    Nilgiri Lieutenant IDF NewBie

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    Lets say it can be reading material for bedtime hehe.

    Yours is precisely why I think organic Q and A is better than a long winded post....but it needs a bit of interest and interaction.
     
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  2. Indx TechStyle

    Indx TechStyle Lieutenant FULL MEMBER

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    SCATSAT-1 Operational Products
    Apr 19, 2017

    For further details Click here
    Related Images
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    More Images...
    PSLV-C35 / SCATSAT-1
     
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  3. layman

    layman Aurignacian STAR MEMBER

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    ISRO plans to increase frequency of launches to 12 per year, says Chairman Kiran Kumar
    Published April 23, 2017
    SOURCE: PTI

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    The Indian Space Research Organisation is trying to increase its capacity to deliver by scaling up the frequency of launches to 12 per year from the seven at present by building more satellites and lowering the cost of access to space. “Earlier, we were doing 2-3 (launches) per year, then we increased it to 4-5, last few years we have been doing seven launches,” space agency Chairman A S Kiran Kumar said.

    “Now, we are trying to go up to 8-9 PSLV per year, two GSLV-Mk II and one GSLV-Mk III. Total about 12 per year,” he said. ISRO is trying to increase its capacity to deliver by scaling up the frequency of launches by building more satellites, lowering the cost of access to space and also to do heavier satellite launches, the chairman said.

    The space agency is in the process of constructing a second vehicle assembly building to improve the turnaround time and throughput for the PSLV so that with the same launch pad ISRO can do more launches, he said.

    Kiran Kumar said approval for a proposal to build a space station was yet to come. ISRO plans to undertake the Chandrayaan-2 mission in the first quarter of the next calendar year, he said. “It (Chandrayaan-2) is a fully Indian affair. There is no Russian participation in that,” Kiran Kumar said. “All the developments required for that, all the variable thrust engines, lander, rover….all that work is going on and we are getting ready for this launch,” he said.

    “Another Mars mission, Venus mission or Asteroids mission…all these possibilities we are working on; study teams are looking at it, and then we will finalise at some point of time and start getting approvals for them,” he said. On reusable launch vehicle, he said ISRO has identified its next steps in terms of air-breathing propulsion system. “We are now trying to do an experiment where it will demonstrate that the thrust generated is more than the friction so that you have a net positive thrust.

    “What we have (already) demonstrated is combustion happening with oxygen and hydrogen. The next step is the thrust whatever is generated should be more than the friction that’s going to come up because of the surfaces involved,” Kiran Kumar explained. “Once that is done, then it’s a big capability. So we are working towards that now and in terms of reusable launch vehicle I think landing gear system to that and conducting some experiments that are the next step and beyond that, we are looking to scale up the model and do the next set of activities,” he said.
     
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  4. GSLV Mk III

    GSLV Mk III Captain FULL MEMBER

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    GSLV- F09

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    GSAT 9

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  5. GSLV Mk III

    GSLV Mk III Captain FULL MEMBER

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    GSAT-9 heralds cost-saving electric propulsion

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    Madhumathi D.S.
    BENGALURU MAY 01, 2017 21:13 IST
    UPDATED: MAY 02, 2017 09:33 IST

    Test feature in May 5 mission is a tool to cut fuel load & space launch costs

    This week's space mission, GSAT-9 or the South Asia Satellite, will carry a new feature that will eventually make advanced Indian spacecraft far lighter. It will even lower the cost of launches tangibly in the near future.

    The 2,195-kg GSAT-9, due to take off on a GSLV rocket on May 5, carries an electric propulsion or EP system. The hardware is a first on an Indian spacecraft.

    M.Annadurai, Director of the ISRO Satellite Centre, Bengaluru, explained its immediate and potential benefits: the satellite will be flying with around 80 kg of chemical fuel - or just about 25% of what it would have otherwise carried. Managing it for more than a decade in orbit will become cost efficient.

    In the long run, with the crucial weight factor coming down later even for sophisticated satellites, Indian Space Research Organisation can launch them on its upcoming heavy rockets instead of sending them to space on costly foreign boosters. Shortly, its own vehicle GSLV MkIII is due for its full test flight.

    Dr. Annadurai told The Hindu that GSAT-9's EPS would be used to keep its functions going when it reaches its final slot - which is roughly about two weeks after launch - and throughout its lifetime.

    Normally the 2,000-kg class INSAT/GSAT communication satellites take 200-300 kg of chemical propellants with them to space. The fuel is needed to keep them working in space, 36,000 km away, for 12 to 15 years.

    Dr. Annadurai said, "In this mission, we are trying EPS in a small way as a technology demonstrator. Now we have put a xenon-based EP primarily for in-orbit functions of the spacecraft. In the long run, it will be very efficient in correcting the [initial] transfer orbit after launch."

    He said that the space agency normally uses up 25-30 kg of fuel on the satellite each year to maintain its functions and orbit position. An EP system would vastly bring this amount down.

    Next big trend

    A xenon based EPS can be five to six times more efficient than chemical-based propulsion on spacecraft and has many uses, according to Dr Annadurai, whose centre assembles all Indian spacecraft. A 3,500-kg EPS-based satellite, for example, can do the work of a conventional spacecraft weighing 5,000 kg, but cost far less.

    "One day, we should be able to launch a 5-tonne equivalent spacecraft - but weighing less than it - on our own GSLV [MkIII.] We are not yet there," he said.

    All this is on the way, may be in around three years. GSAT-20 is planned as the first fully EPS-enabled satellite; its features were not immediately available. ISAC and the Kerala-based Liquid Propulsion Systems Centre are lead centres in developing it.

    Next Big Trend

    A trend that started about four years back, EPS is expected to drive half of all new spacecraft by 2020. For Space-dependent sectors across the globe, the economic benefits of EP systems are said to be immense. Currently government-owned and private space players agencies are said to be scrambling to make space missions 30 per cent cheaper than now - by lowering the per-kg cost of lifting payloads to specific distances.

    --------------------------------------------------------------------------------------------------------------------------------------------------

    GSAT9 uses 75 mN Stationary Plasma Thrusters for station keeping. 300 mN SPTs are being developed for orbit raising, for use in all electric propulsion spacecraft.

    IMG_20160831_001626.jpg

    In addition to these efforts, ISRO sponsored research at Bellatrix Aerospace has already developed a prototype Magnetoplasmadynamic (MPD) thruster. This type can develop extremely high specific impulse & can be developed into higher thrust systems with 'suitable power sources' :rolleyes: @PARIKRAMA @Nilgiri
     
    Last edited: May 2, 2017
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  6. kurup

    kurup 2nd Lieutant IDF NewBie

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    GSLV MK2 launch scheduled for May 5 to 7 .

    BAY OF BENGAL AND ANDAMAN SEA (.) CHARTS 32 INT 71 706 (.) GSLV LAUNCH SCHEDULED FROM 05 – 07 MAY 17 FROM 1100 - 1500 UTC FROM

    13-43.2N 080-13.8E 2. DANGER ZONE AS FOLLOWS ZONE -1: CIRCLE OF 10 NM AROUND LAUNCHER ZONE–2: 11-50N 085-15E, 12-35N 085-25E, 12-15N 086-25E, 11-30N 086-15E ZONE–3: 10-35N 089-15E, 11-15N 089-25E, 11-00N 090-05E, 10-20N 089-55E ZONE–4: 07-50N 095-15E, 09-30N 095-15E, 09-30N 096-05E, 07-50N 096-05E

    3. CANCEL THIS MSG 071600 UTC MAY 17
     
  7. GSLV Mk III

    GSLV Mk III Captain FULL MEMBER

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    Launched!!!
     
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  8. GuardianRED

    GuardianRED Captain FULL MEMBER

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    live link?
     
  9. stephen cohen

    stephen cohen Lieutenant FULL MEMBER

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    No live telecast this time
     
  10. GuardianRED

    GuardianRED Captain FULL MEMBER

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    so how does one get update :(
     
  11. GSLV Mk III

    GSLV Mk III Captain FULL MEMBER

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  12. sangos

    sangos Lt. Colonel ELITE MEMBER

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    Man there' a lot of stuff falling off that rocket. Makes one nervous but guess they are all dispensable.
     
  13. GSLV Mk III

    GSLV Mk III Captain FULL MEMBER

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    foam ;)
     
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  14. GuardianRED

    GuardianRED Captain FULL MEMBER

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    Boss, Why did they ban u on PDF?
     
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  15. Gessler

    Gessler BANNED BANNED

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    GSLV Mk.III D1 being assembled and rolled out prior to the scheduled June 5 launch...

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    C25 Cryogenic stage

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    S200 strap-on boosters integrated with L110 stage

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    L110 stage hoisted into position

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    L110 at Stage Preparation Facility

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    S200 strap-ons :) at the launch pedestal


    GSLV-Mk III is capable launching 4 ton class of satellites to Geosynchronous Transfer orbit (GTO). It is a three-stage vehicle with two solid motor strap-ons (S200), a liquid propellant core stage (L110) and a cryogenic stage (C25). GSLV-Mk III-D1 is the first developmental flight, carrying 3136 kg GSAT-19 satellite to a Geosynchronous Transfer Orbit (GTO). The vehicle is configured with a 5 m ogive payload fairing and slanted strap-on nose cone to provide aerodynamic robustness.

    GSLV Mk III-D1/GSAT-19 Mission is scheduled to be launched on June 05, 2017 at 17:28 Hrs (IST) from the Second Launch Pad at SDSC SHAR, Sriharikota

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    GSAT-19 in the Clean Room at SDSC SHAR

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    GSAT-19 in an anechoic chamber at the Compact Antenna Test Facility (CATF)

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    GSAT-19 being prepared for Thermal Vacuum Test

    http://isro.gov.in/launcher/gslv-mk-iii-d1-gsat-19-mission

    @PARIKRAMA @randomradio @Indx TechStyle @GSLV Mk III @Agent_47 @Levina @Abingdonboy @Fox @Grevion @MilSpec
     

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