^Input_2, do you have source for the above rescheduled date?
ISRO to take final decision on GSLV launch tomorrowUnited News of IndiaChennai, December 21, 2010A final decision on a new date for the launch of India's advanced and heaviest communication satellite GSAT-5P, by the Geosynchronous Satellite Launch Vehicle (GSLV-F06), using Russian cryogenic stage, is expected to be taken by tomorrow afternoon.Indian Space Research Organisation (ISRO) sources told UNI here today crucial tests were going at the spaceport of Sriharikota, about 100 km from here, in this regard."The tests will continue till tomorrow morning. After the outcome of the tests are known, the scientists will take a final decision on the launch of GSLV Mission", ISRO spokesman S Satish said.The launch was earlier scheduled for Decemebr 20, but it was postponed after a leak was noticed in one of the valves of the Russian cryogenic engine during pre-countdown tests.Subsequently, the T-29 hour countdown, scheduled to begin at 1101 hrs on December 19, was stopped.The spokesman told UNI that an announcement on the date of launch was expected around tomorrow afternoon."The tests are continuing and will continue all through the night and tomorrow morning. We can expect some announcement on the date of launch by tomorrow afternoon," he added.
How reliable are Russian Cryos? Is there any fault in manifacturing of cryos itself or our scientists don't have know how about it? This is not for first time ISRO has faced using Russian Cryo in GSLV. I think India should postpone GSLV trials unless its own CRYO gets ready (which should have been done by now.)
ISRO clears GSLV launch after tests news 22 December 2010 Chennai: The Indian Space Research Organisation (ISRO) on Wednesday began preparing for the launch of an advanced communications satellite once again after investigations into a leaking rocket engine valve revealed no danger to flight plans.The flight of ISRO's heaviest rocket, the Geosynchronous Satellite Launch Vehicle (GSLV-F06), which has a cryogenic final stage, had to be aborted after the fault developed. The cryogenic engine has been supplied by Russia.The leak in the engine was detected during the pre-countdown tests on Sunday, even as the 51-metre tall rocket was already placed on the launch pad at Sriharikota. The GSAT-5P satellite is meant to retire the INSAT-2E sent up in 1999 and ensure continuity of telecom, TV and weather services. The flight was originally scheduled for Monday. According to S Satish, director, ISRO: ''The test results are satisfactory and the rocket's launch date is being finalised.'' The tests were conducted Tuesday to gauge the extent of the valve leak in consultation with Russian scientists. The Russians had supplied seven cryogenic engines through an earlier contract, of which five have already been used in earlier GSLV launches.
GSLV mission to be launched on Dec 25Bangalore, Dec 22 (PTI) The launch of India''s latest communication satellite GSAT-5P has now been slated for December 25, a week after it was put off following a leak in the Russian cryogenic stage of the launch vehicle."The launch is scheduled for December 25 at 4.01 pm (from the spaceport of Sriharikota in Andhra Pradesh). A 29-hour countdown will start on December 24 at 11.01 am," Indian Space Research Organisation (ISRO) spokesperson S Satish told PTI here.The satellite would be launched by ISRO''s Geo-Synchronous Satellite Launch Vehicle (GSLV-F06), powered by Russian cryogenic stage.The spacecraft, which would boost India''s communication services including TV and telecommunication, was originally slated for launch on December 20.But a day earlier, the space agency put off the launch due to a "minor leak" in one of the valves of the Russian Cryogenic stage, observed during the pre-countdown checks.After the postponement, ISRO said the revised date would be finalised after ascertaining the cause of the leak, remedial actions and due verifications.Earlier in the day, another ISRO official said on condition of anonymity that the "leak had remained the same and it had not increased which means it is a liveable leak and the mission had been given a go-ahead".
India to launch advanced communications satellite Dec 252010-12-22 21:30:00Chennai, Dec 22 (IANS) With investigations into a leak in a rocket engine's valve providing satisfactory results Wednesday, the Indian Space Research Organisation (ISRO) will celebrate Christmas by launching an advanced communications satellite, an official.'The test results are satisfactory and the rocket's launch is scheduled Dec 25. The launch countdown will begin 11 a.m. Friday,'S. Satish, a director at ISRO, told IANS.The rocket carrying the GSAT-5P satellite is expected to blast off from the second launch pad between 4 p.m.-4.15 p.m. Saturday.The GSAT-5P is meant to retire the INSAT-2E satellite sent up in 1999 to ensure continuity of telecom, TV and weather services and was originally scheduled for Monday.However, ISRO Sunday decided to postpone the launch of its geosynchronous satellite launch vehicle (GSLV) after it detected a leak in one of the valves of its Russian-made cryogenic engine.The leak was detected during the pre-countdown tests, even as the 51-metre tall rocket was on the launch pad at Sriharikota, around 80 km from here.ISRO officials had said some tests would be conducted Tuesday to gauge the extent of the valve leak. They said the tests and discussions with Russian scientists would go hand-in-hand at Sriharikota.The Russians had supplied seven cryogenic engines, of which five were used in earlier GSLV launches.Another ISRO official, speaking on condition of anonymity, told IANS that the tests took around 30 hours and involved filling of liquid oxygen to check the valve. The liquid oxygen had to be later drained. The rocket's ground systems had to be reconfigured for the tests.The cryogenic engine is fired by liquid hydrogen as fuel and liquid oxygen as oxidizer.According to the official, the valve leak was in the liquid oxygen system while all other valves were functioning well.He said the tests started Tuesday at 4 a.m. and concluded at around 8 a.m. Wednesday.'The activities undertaken were similar to the ones carried out for a regular rocket launch. Around 100 scientists and technologists were involved in tests,' he said.
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Quote from: kanaka on 12/22/2010 12:31 amHow reliable are Russian Cryos? Is there any fault in manifacturing of cryos itself or our scientists don't have know how about it? This is not for first time ISRO has faced using Russian Cryo in GSLV. I think India should postpone GSLV trials unless its own CRYO gets ready (which should have been done by now.)How reliable are Indian LV? Are You remember leaks on the second stages PSLV-C15 and GSLV Mk III?
Countdown starts for GSAT-5P launchThe count down has started for the launch of India’s latest communication satellite GSAT-5P on board GSLV-F06 launch vehicle from Sriharikota on Saturday.ISRO spokesperson S Satish told PTI that the 30-hour count down started at 10.04 hours this morning and was progressing well.The launch of the satellite, which was originally scheduled for December 20, had been postponed after a leak in the Russian cryogenic engine on board the launch vehicle.GSAT-5P with 24 C-band transponders and 12 extended C-band transponders is meant for augmenting communication services currently provided by Indian National Satellite System (INSAT). It is meant to boost TV, telemedicine and tele-education, and telephone services.The satellite, developed by ISRO Satellite Centre, Bangalore, is the fifth in the GSAT series. It has a designed mission life of 12 years.
http://www.thehindu.com/sci-tech/science/article974181.eceQuoteCountdown starts for GSAT-5P launchThe count down has started for the launch of India’s latest communication satellite GSAT-5P on board GSLV-F06 launch vehicle from Sriharikota on Saturday.ISRO spokesperson S Satish told PTI that the 30-hour count down started at 10.04 hours this morning and was progressing well.
Countdown starts for GSAT-5P launchThe count down has started for the launch of India’s latest communication satellite GSAT-5P on board GSLV-F06 launch vehicle from Sriharikota on Saturday.ISRO spokesperson S Satish told PTI that the 30-hour count down started at 10.04 hours this morning and was progressing well.
Webcasts available?
Usually ISRO starts a channel on Edust/Insat-4CR/insta-4b which shows the whole launch in real time, I remember watching those earlier launches from Edusat, Everything from the "breaking of coconut" ceremony is broadcast live, Cant say which satellite it will come this time
ISRO has started live relay channel on INSAT-4CR, TP 11656 V 3333, Test going on now, The whole launch can be seen as usual, Now running some launch films from Ariane
