ISRO General News & Updates

[abhinaba]

Oct 09, 2016

South Solar Array and West Antenna of GSAT-18 have been successfully deployed​

 

[abhinaba]

Oct 09, 2016

North Solar Array and East Antenna of GSAT-18 have been successfully deployed

 

[abhinaba]

Oct 09, 2016

After all the successful deployments on GSAT-18, 3-axis stabilisation using reaction wheels has been achieved at 19:26hr IST on Oct 09, 2016. The performance of subsystems of the spacecraft is normal​

 

[abhinaba]

ISRO gears up for launch of 3.3-tonne payload​

VIJAYAWADA, October 8, 2016​

After the successful accomplishment of the longest flight of its workhorse PSLV late last month, the Satish Dhawan Space Centre (SDSC) at Sriharikota is turning to its next generation space vehicle GSLV Mk-III to reach a major milestone soon.

The target is to put into orbit GSAT-19E, an indigenous communication satellite that will weigh about 3.3 tonnes, the heaviest payload to be launched from the Indian spaceport.

However, it will be just a few notches lighter than GSAT-18 (3.5 tonnes) that was sent into space by the European Space Agency from French Guiana on Thursday.

“The satellite assembly and launching process of the GSLV Mk-III are in advanced stages. We are confident that SDSC will make yet another mark among the space-faring nations,” said SDSC Deputy Director M. Badarinarayana Murthy.

On the sidelines of a scientific exhibition organised by the SDSC as part of the World Space Week celebrations at V.R. Siddhartha Engineering College here on Friday, Mr. Murthy told The Hindu that said the target was to take the payload capacity beyond four tonnes in the coming years while concentrating on the launch of Chandrayaan-II, India’s path-breaking lunar probe, in less than two years.

New cryogenic engine

Regarding the launching of GSAT-19E, Mr. Murthy said the GSLV Mk-III hardware was being assembled and other mission control processes were under way. “They have so far been flawless and we are confident of achieving perfection for the December launch,” he asserted.

Mr. Murthy said GSLV Mk-III would have a new cryogenic engine that can take payloads in excess of 4-plus tonnes into space with ease.

Simultaneous work was being done on the Indian Regional Navigation Satellite System, Mr. Murthy said, adding that extension of the life of Mars Orbiter Mission beyond the initial six-month mission was a major achievement of ISRO.

My Personal View : To increase payload why ISRO needs SCE200 engine or SC160 stage when China is able to launch payload of 5-5.5 tons by a launch vehicle which configuration wise is more or less similar to GSLV Mark-II ? 

The answer is hidden within the diplomatic relationship between INDIA & ASEAN countries. 
These countries specifically Malaysia and Indonesia don't want their water to be used as a impact zone of spent stages of GSLVs. Therefore it was decided that the impact of GS2 will be contained within the waters of INDIA in Andaman Sea. It results in payload loss of 750 Kg for GSLV Mark-II.
 
For the same reason we will not be able to use SCE200 engine in its full potentiality. Unlike INDIA, China don't bother by neighboring country's safety. So, they are able to launch higher payload by only increasing the propellant loading in lower stages of Long March-3B which we can't follow with our GSLV Mk-II/III.

As a result when China is aiming 10 tonne  GTO capability with their new HLV - Long March 5, we are satisfied with only 6 tonne capability.

Source: ISRO gears up for launch of 3.3-tonne payload - The Hindu

 

[Sarkar]

Nothing diplomatic :no 

It's all technical, China is far more superior than us in space technology bcoz of the investment their Govt made in that sector when our parliamentarians were busy in stalling parliament  :wall

 

[abhinaba]

Nothing diplomatic :no 





It's all technical, China is far more superior than us in space technology bcoz of the investment their Govt made in that sector when our parliamentarians were busy in stalling parliament  :wall

In space technology China is not superior than us. Their propulsion technology is inferior to us. Even their new semi cryogenic engine YF-100 is a reengineered version of RD-120. China is only good in copy-paste.

What i mentioned is a genuine fact which was shared by eminent ISRO scientist MOHAN SUNDARA RAJAN during an interaction with students in a seminar organised by our University.

 

[abhinaba]

Mohan Sundara Rajan clearly mentioned about the problem in choice of impact zone for which launch trajectory to GTO was changed & it results in payload capacity loss of 750 kg for GSLV Mark-II. Offcourse he avoided diplomatic question i.e why i give my personal view in the post.

 

[Sarkar]

In space technology China is not superior than us. Their propulsion technology is inferior to us. Even their new semi cryogenic engine YF-100 is a reengineered version of RD-120. China is only good in copy-paste.

What i mentioned is a genuine fact which was shared by eminent ISRO scientist MOHAN SUNDARA RAJAN during an interaction with students in a seminar organised by our University.

If their engine is reengineered so is our Vikas engine which is reengineered version of Viking Engine of Ariane launcher. There is nothing wrong in reengineered, at least they have the talent and Govt intention with financial support to copy a masterpiece of technology 


They are able to do a soft landing on moon, have their own space station, able to send astronaut in space and bring them back safely to earth, can launch heavier payload to orbit, have their own independent global satellite navigaition system so accept the truth that they are far superior than us, there is no doubt in it :s

 

[abhinaba]

If their engine is reengineered so is our Vikas engine which is reengineered version of Viking Engine of Ariane launcher. There is nothing wrong in reengineered, at least they have the talent and Govt intention with financial support to copy a masterpiece of technology 


They are able to do a soft landing on moon, have their own space station, able to send astronaut in space and bring them back safely to earth, can launch heavier payload to orbit, have their own independent global satellite navigaition system so accept the truth that they are far superior than us, there is no doubt in it :s

Yes our budget was small but before 1989 China was poorer than us. But as a communist country what China did we can't. They infuse more money in strategic sectors than us but their public health, average people's life was very bad than us. Against all odds ISRO could have mastered in cryogenic technology if we were not hold back by technology embargo. It is USA who facilitated China over India & help them to develop Long March-3B. Even after technological embargo ISRO under the leadership of  Mr. Nambi Narayanan was ready to test cryogenic engine in 1994 but fearing India will be self-reliant in space launch USA made a fabricated spy story & make Mr. Nambi Narayanan & his whole team as traitors of nation. As a result whole project was in jeopardy; ISRO lost 6 crucial years & a brilliant team of scientists.

 

[abhinaba]

It seems the SCE-200 - Wikipedia is developed from blueprints sold by Yuzhnoye. That same blueprint could be sold by the Ukrainian as the RD-810, if they had the money to actually build and test the prototypes. The YF-100 appears to have the same relationship with the RD-801 - Wikipedia.