The ISRO hopes to launch the ‘twin’ - GSLV-D6 - by July or August this year, ISRO officials said.“The GSLV-D6 mission will ditto the GSLV-D5 which was used for the January 5 launch. It will build our confidence in the technology,” M C Dathan, director of ISRO’s Liquid Propulsion Systems Centre (LPSC), told ‘Express’.The home-made cryogenic engine, which will power the upper stage of GSLV-D6, is “three-fourths” ready. Tests are currently underway on it, he said.
Like the GSLV D-5, D6 too will have a communication satellite of the GSAT series as payload.
Flush with the success of the GSLV-D5, which used an indigenous cryogenic stage to put the GSAT-14 into orbit, the Indian Space Research Organisation is getting ready for the next GSLV flight with its own cryogenic engine within a year. It will put the communication satellite GSAT-6 into orbit.
The next GSLV flight with an indigenous cryogenic engine can be within a year. The GSLV has been identified for Chandrayaan-2. Once we make one more successful launch, we can confidently assign it for Chandrayaan-2. We are sure we will be able to repeat the success.
The April 15, 2010 flight, which was the first to use India’s own cryogenic stage, was to put a GSAT that weighed 2,220 kg into orbit. But GSLV-D5 used a 1,983-kg GSAT-14. So, the payload was lighter by 240 kg in the successful GSLV-D5 mission. Does this detract from its success?After we faced the failure of GSLV-D3 and lost the GSAT-4 satellite, we thought it was prudent to play it safe and keep the primary mission objective of GSLV-D5 as proving the indigenous cryo stage in flight with the deployment of a satellite as an additional bonus. As such, we planned a lighter GSAT-14 with fewer transponders to keep the cost low. Also, the urge to make the CUS more robust in this second attempt, especially after the GSLV-F06 failure, attributed to the deflection and breaking of the shroud in the cryo stage, did indeed increase the inert weight of the CUS in GSLV-D5. All these factors made us attempt GSLV-D5 with GSAT-14 weighing less than GSAT-4 of GSLV-D3. However, this in no way brings down the significance of proving successfully the indigenous cryo stage. The restoration of payload to two-tonne-plus will happen in the very next flight through the optimisation of inert mass and a realistic pruning of margins.I can confidently say that once we have a working cryo stage and the GSLV, enhancing its performance or payload incrementally is bound to happen in subsequent flights, as demonstrated in the case of the PSLV.
What could be the thrust produced by Cryogenic Engine to be used in GSLV-D6 Mk II - GSAT-6? Any advanced version of cryogenic will be used?
The GSLV project has successfully launched GSLV-D5 flight with indigenous Cryogenic engine and stage on 5th January 2014 from Satish Dhawan Space Centre, Sriharikota and is currently preparing for the next flight GSLV namely, GSLV-D6.
Cryogenic engine required for next flight GSLV-D6 is also prepared and is undergoing acceptance testing.
So far, eleven cryogenic engines for GSLV and two higher thrust cryogenic engines for GSLV Mk-III have been realized.
This satellite is now reserved for strategic applications.
Quote from: antriksh on 10/30/2014 03:15 amThis satellite is now reserved for strategic applications.I wonder what the possible military applications could be. Encrypted direct satellite communication for satellite phones and other mobile communication devices for use by the three services?
Does anyone know when the GSLV D6 Launch will take place ? According to SpaceFlightNow.com, the launch schedule seems to have slipped to May this year from March.
QuoteDoes anyone know when the GSLV D6 Launch will take place ? According to SpaceFlightNow.com, the launch schedule seems to have slipped to May this year from March.Between July and August 2015
The second [GSLV Mk2] launch has been planned for July this year. Two more launches will happen in 2016, and it will carry communication satellites in all these trips.
"We will launch GSAT-6 for strategic applications in July-end or August beginning, with a special antenna that will have a capability to use a handheld device to communicate from anywhere," Indian Space Research Organisation (ISRO) chairman AS Kiran Kumar told reporters in Bengaluru.ISRO will use a heavy rocket - geosynchronous satellite launch vehicle (GSLVA Mark II) to launch the 2-tonne GSAT-6 with 10 special transponders from its spaceport at Sriharikota in Andhra Pradesh.
“We will launch GSAT-6 for strategic applications in July-end or August beginning, with a special antenna that will have a capability to use a handheld device to communicate from anywhere,” Indian Space Research Organisation (ISRO) chairman A.S. Kiran Kumar told reporters here.ISRO will use a heavy rocket – geosynchronous satellite launch vehicle (GSLVA Mark II) to launch the 2-tonne GSAT-6 with 10 special transponders from its spaceport at Sriharikota in Andhra Pradesh.“The six-metre diameter antenna will be one of the scientific instruments onboard the satellite. We are making optical instruments for measurements using optimal techniques,” Kiran Kumar said on the margins of a function here.The instruments are also used in telescopes of 1.2 metre and 0.7 metre mirrors, which are measured to nanometer accuracy.
