GSLV Mark II
- Thread starter sathya
- Start date
Defenceindia2010
Regular Member
- Joined
- Aug 21, 2010
- Messages
- 449
- Likes
- 324
Re: ISRO to launch GSLV-D5 in July
why don't we have the chaps at ISRO 
run the country. 
I have an IDEA fellow members, instead of POLITICIANS
why don't we have the chaps at ISRO run the country.
Last edited by a moderator:
Why waste talent in a cesspool of politics?
I have an IDEA fellow members, instead of POLITICIANS
venkat
Regular Member
- Joined
- Apr 6, 2009
- Messages
- 907
- Likes
- 203
Re: ISRO to launch GSLV-D5 in July
ISRO failure analysis and remedial actions have also been top class .Other organizations like HAL,BEL,BHEL etc.. have a lot to learn from ISRO's work culture. GO ISRO GO..high up above in the sky!!! best of Luck!!!!
ISRO failure analysis and remedial actions have also been top class .Other organizations like HAL,BEL,BHEL etc.. have a lot to learn from ISRO's work culture. GO ISRO GO..high up above in the sky!!! best of Luck!!!!
johnnyboy
Regular Member
- Joined
- Mar 21, 2012
- Messages
- 245
- Likes
- 209
Re: ISRO to launch GSLV-D5 in July
ISRO calls off GSLV D-5 launch at 11th hour after fuel leakage | Business Standard
ISRO calls off GSLV D-5 launch at 11th hour after fuel leakage | Business Standard
Re: ISRO to launch GSLV-D5 in July
Hope ISRO gets to the bottom of the problem and nail it.
Very true. But what's befuddling is the fact that the second stage, which is the same as that of the ultrasuccessful PSLV, has been the source of trouble this time. PSLV has had so many successful flights without a hint of trouble.
Hope ISRO gets to the bottom of the problem and nail it.
happy
Senior Member
- Joined
- Mar 12, 2013
- Messages
- 3,370
- Likes
- 1,454
Kozhikode(Ker): The launch of Geosynchronous Satellite Launch Vehicle (GSLV), which was deferred on 19 August following a flaw in the rocket, will take place on 15 December, ISRO head said here today. "The launch of GSLV D5 satellite which was postponed on 19 August about two hours before liftoff after detection of a fuel leak in the rockets' second stage will now be held on 15 December," ISRO chairman Dr K Radhakrishnan said at an interactive session with students and teachers here.
GSLV is a three-stage/engine rocket. The first stage is fired with solid fuel, the second is the liquid fuel and the third stage is the cryogenic engine. Geosynchronous satellites are placed in orbits 36,000 km above the earth. Pointing to ISRO's numerous achievements in the last 50 years, he said India ranks sixth globally in space technology. The primary objective is to advance space technology and use its applications for national benefit and for the people. Radhakrishnan said India's ambitious project Mars Orbiter Mission (MOM) will be launched from Sriharikota on 28 October. It has undergone extensive pre-launch test at ISRO's satellite centre in Bangalore, he said. Nearly 100 students and teachers attended the programme at the Regional Science Centre and Planetarium.
Read more at: http://www.firstpost.com/fwire/gslv...r-1138581.html?utm_source=fwire&utm_medium=hp
GSLV is a three-stage/engine rocket. The first stage is fired with solid fuel, the second is the liquid fuel and the third stage is the cryogenic engine. Geosynchronous satellites are placed in orbits 36,000 km above the earth. Pointing to ISRO's numerous achievements in the last 50 years, he said India ranks sixth globally in space technology. The primary objective is to advance space technology and use its applications for national benefit and for the people. Radhakrishnan said India's ambitious project Mars Orbiter Mission (MOM) will be launched from Sriharikota on 28 October. It has undergone extensive pre-launch test at ISRO's satellite centre in Bangalore, he said. Nearly 100 students and teachers attended the programme at the Regional Science Centre and Planetarium.
Read more at: http://www.firstpost.com/fwire/gslv...r-1138581.html?utm_source=fwire&utm_medium=hp
Compersion
Senior Member
- Joined
- May 6, 2013
- Messages
- 2,258
- Likes
- 923
The americans knows that we are developing our GSLV and GSLV MK3. Once these get into operations it is a beautiful opportunity to use it for themselves (due to cost and reliability and trust). I would have liked to see USA (with Russian acknowledgment) offer input on our indigenous GSLV(s) improvement.
It would be good to have this done under the umbrella that the americans helped the chinese too much ... the americans have used chinese launchers because of cost previously. there is also a wider angle of backstabbing and illegal technology transfer (Intelsat 708)
if that happened previously and in such a manner - why not americans use indian launchers today because indians and ISRO cannot be challenged on cost and quality. also satellites have reduced dramatically in size and weight. and most importantly the indian model is joint development work and we pay for technology transfer and royalty - since we dont believe in stealing and it would be better for the relationship if we are upfront and take technology by monetary cost. also there is the indian american community connections, silicon valley and nasa, etc
the americans and russians can be told to help us (with acknowledgement from both USA and Russia) because of what the chinese have gained from both Russia and American earlier (through backstabbing and stealing of technology). both the russians and americans must have archives of how the chinese backstabbed them.
In summary it is like the ideal partnership. India and USA. yet the (relationship) rocket is still on launch pad. a bit like our GSLVs. waiting for lift off.
One thing is for sure we wont backstab Russia (and rightly).
It would be good to have this done under the umbrella that the americans helped the chinese too much ... the americans have used chinese launchers because of cost previously. there is also a wider angle of backstabbing and illegal technology transfer (Intelsat 708)
Intelsat 708 - Wikipedia, the free encyclopedia
if that happened previously and in such a manner - why not americans use indian launchers today because indians and ISRO cannot be challenged on cost and quality. also satellites have reduced dramatically in size and weight. and most importantly the indian model is joint development work and we pay for technology transfer and royalty - since we dont believe in stealing and it would be better for the relationship if we are upfront and take technology by monetary cost. also there is the indian american community connections, silicon valley and nasa, etc
the americans and russians can be told to help us (with acknowledgement from both USA and Russia) because of what the chinese have gained from both Russia and American earlier (through backstabbing and stealing of technology). both the russians and americans must have archives of how the chinese backstabbed them.
In summary it is like the ideal partnership. India and USA. yet the (relationship) rocket is still on launch pad. a bit like our GSLVs. waiting for lift off.
One thing is for sure we wont backstab Russia (and rightly).
Last edited:
- Joined
- Feb 16, 2009
- Messages
- 3,474
- Likes
- 1,061
Re: ISRO to launch GSLV-D5 in July
Could Isro not have waited for the GSLV to fly the mission since this would take the orbiter closer to Mars?
In August 2010, we formed a study group on what we should do, whether we should do a fly by or an orbiter. Fly by means we can carry large instruments but the observation time is very short but we can be successful because it will always pass somewhere near Mars. But we decided there is no point. We were clear we should do an orbiter. We then put up a team and they worked up to June 2011. They came out with a report with all the options. After looking at the vehicle that we have and what is required, a decision was taken.
There are two types of orbits — we have chosen a 365-by-80,000 km orbit which will require 855 kg of fuel. If I have to put it in a circular orbit of 1,000 km, we need 2,000 kg of propellant. That means the fuel itself is two tonnes — at present it is 850.8 kg. If you take the spacecraft, it is in the range of 500 kg to 600 kg. That means for a circular 1,000 km orbit, you are talking a 2,600-kg spacecraft. With a 1,350-kg satellite I am now getting a 350-by-80,000 km orbit.
Now if you are at 1,000 km orbit like Maven you need a couple of tanks, couple of liquid apogee motors, so you have to devise a different configuration for the orbiter spacecraft. Then there is the question of launcher. Even GSLV cannot lift it because its capacity is 2,200 kg. We are talking of 2,600 kg, plus the instrument. We decided to go for the elliptical orbit, 365-by-80,000.
There were launch opportunities for 2013, 2016 and 2018. Because of the geometries involved, 2016 would be costlier. You need a vehicle like GSLV at that time. In short, what we have done is that we have availed the best available opportunity — 2013 November.
How different would the Mars mission be if Isro were to wait for the GSLV?
If we had GSLV, two things would have happened, this transfer that we are talking of if you had the same mass of spacecraft, 1,350 kg, the initial orbit could have been bigger. Instead of 250 km-by-23,000 km, it could have been 36,000 km or 40,000 km. That means the number or orbit raisings could have been reduced. Secondly, we could have carried more payload. Now we are carrying 15 kg, it could have carried a few 100 kg — but where is the payload for it. There is no instrument, so there was no need. What we now have is a prudent strategy. GSLV would need more fuel for achieving the 1,000-km orbit around Mars (which is closer than the 350-by-80,000 km orbit for MOM) and it would need a different spacecraft. Though there is criticism there are clear parameters that have helped us decide.
Between the Mars mission and the GSLV development, which has suffered setbacks, which would you categorise as being the key to India's space programme?
Both are important. In the launch vehicle, GSLV is essential. If you look at GSLV, the first launch was aborted in 2001 because there was a problem. Within 22 days we corrected that and we had a flight. It injected a satellite but there was under-performance in the last cryogenic stage and the satellite did not last more than two months. Second and third were successful flights. The fourth flight was a failure and in the fifth, there was a problem in the control system. These were component problems. After nearly two-and-a-half years, we had a flight in April 2010 but last-stage cryo did not perform. It was the first flight for the indigenous cryo. In December 2010, the Russian cryogenic stage developed problems. The vehicle had to be destroyed. We went back to testing, reviews and we came back to launch earlier this year but there was a leak. GSLV is essential. We have been working on an indigenous cryo stage for the last 20 years, we have to stick with it. GSLV MK III is another advanced vehicle that we are developing. Now we are going to have the ground test of the cryogenic stage also. We had a small test last week that was successful. When you talk priorities you must understand these are two different areas. A Mars mission has no conflict with the development of GSLV.
'Mission not in conflict with GSLV development' - Financial Express
Could Isro not have waited for the GSLV to fly the mission since this would take the orbiter closer to Mars?
In August 2010, we formed a study group on what we should do, whether we should do a fly by or an orbiter. Fly by means we can carry large instruments but the observation time is very short but we can be successful because it will always pass somewhere near Mars. But we decided there is no point. We were clear we should do an orbiter. We then put up a team and they worked up to June 2011. They came out with a report with all the options. After looking at the vehicle that we have and what is required, a decision was taken.
There are two types of orbits — we have chosen a 365-by-80,000 km orbit which will require 855 kg of fuel. If I have to put it in a circular orbit of 1,000 km, we need 2,000 kg of propellant. That means the fuel itself is two tonnes — at present it is 850.8 kg. If you take the spacecraft, it is in the range of 500 kg to 600 kg. That means for a circular 1,000 km orbit, you are talking a 2,600-kg spacecraft. With a 1,350-kg satellite I am now getting a 350-by-80,000 km orbit.
Now if you are at 1,000 km orbit like Maven you need a couple of tanks, couple of liquid apogee motors, so you have to devise a different configuration for the orbiter spacecraft. Then there is the question of launcher. Even GSLV cannot lift it because its capacity is 2,200 kg. We are talking of 2,600 kg, plus the instrument. We decided to go for the elliptical orbit, 365-by-80,000.
There were launch opportunities for 2013, 2016 and 2018. Because of the geometries involved, 2016 would be costlier. You need a vehicle like GSLV at that time. In short, what we have done is that we have availed the best available opportunity — 2013 November.
How different would the Mars mission be if Isro were to wait for the GSLV?
If we had GSLV, two things would have happened, this transfer that we are talking of if you had the same mass of spacecraft, 1,350 kg, the initial orbit could have been bigger. Instead of 250 km-by-23,000 km, it could have been 36,000 km or 40,000 km. That means the number or orbit raisings could have been reduced. Secondly, we could have carried more payload. Now we are carrying 15 kg, it could have carried a few 100 kg — but where is the payload for it. There is no instrument, so there was no need. What we now have is a prudent strategy. GSLV would need more fuel for achieving the 1,000-km orbit around Mars (which is closer than the 350-by-80,000 km orbit for MOM) and it would need a different spacecraft. Though there is criticism there are clear parameters that have helped us decide.
Between the Mars mission and the GSLV development, which has suffered setbacks, which would you categorise as being the key to India's space programme?
Both are important. In the launch vehicle, GSLV is essential. If you look at GSLV, the first launch was aborted in 2001 because there was a problem. Within 22 days we corrected that and we had a flight. It injected a satellite but there was under-performance in the last cryogenic stage and the satellite did not last more than two months. Second and third were successful flights. The fourth flight was a failure and in the fifth, there was a problem in the control system. These were component problems. After nearly two-and-a-half years, we had a flight in April 2010 but last-stage cryo did not perform. It was the first flight for the indigenous cryo. In December 2010, the Russian cryogenic stage developed problems. The vehicle had to be destroyed. We went back to testing, reviews and we came back to launch earlier this year but there was a leak. GSLV is essential. We have been working on an indigenous cryo stage for the last 20 years, we have to stick with it. GSLV MK III is another advanced vehicle that we are developing. Now we are going to have the ground test of the cryogenic stage also. We had a small test last week that was successful. When you talk priorities you must understand these are two different areas. A Mars mission has no conflict with the development of GSLV.
'Mission not in conflict with GSLV development' - Financial Express
happy
Senior Member
- Joined
- Mar 12, 2013
- Messages
- 3,370
- Likes
- 1,454
Preparations in full swing for December 15 GSLV mission
BANGALORE: Even as ISRO successfully launched the Mars Orbiter Mission (MOM), preparations are in full swing for flight-testing of GSLV with indigenous cryogenic engine, a key step to boost the country's confidence in terms of its self-reliance in launch capability, on December 15.
"We have put all our efforts for the development of GSLV", ISRO Chairman K Radhakrishnan said. "The assembly of GSLV is going on at Sriharikota. It started on October 18. Now, the launch is scheduled for December 15th".
The maiden flight testing of the indigenous cryogenic engine and stage conducted in GSLV-D3 on April 15, 2010, failed.
ISRO made another attempt on August 19 this year but the the launch was called off as a leak was observed in the UH25 fuel system of the liquid second stage during the pre-launch pressurisation phase on the vehicle just two hours before the scheduled lift-off.
GSLV is a three stage vehicle. GSLV is 49 metre tall, with 414 tonne lift off weight. First stage comprises S125 solid booster with four liquid (L40) strap-ons. Second stage (GS2) is liquid engine and the third stage (GS3) is a cryostage.
The cryostage is more efficient compared to the liquid stage in PSLV. This means that the thrust developed by burning each kg of propellant is higher in cryo engine, hence can place larger payloads with higher weight into orbit. "Cryo stage as final stage is hence essential for a launcher with higher payload capacity", an ISRO official said.
PSLV is capable of launching 1600 kg satellites in 620 km sun-synchronous polar orbit and 1050 kg satellite in geo-synchronous transfer orbit (GTO).
"This poses a serious limitation on launching communication satellites which are heavier. The GSLV will be capable of launching satellites which are 2000 kg - 2500 kg which matches with the GSAT class of Communication satellites", it was noted.
Currently, India is forced to outsource the heavy launch services from abroad which is not a cost effective solution The establishment of a proven GSLV launcher is the need of the hour. The successful development of indigenous cryostage will boost India's confidence in terms of its self reliance in the launch capability, ISRO officials said.
Preparations in full swing for December 15 GSLV mission - The Economic Times
BANGALORE: Even as ISRO successfully launched the Mars Orbiter Mission (MOM), preparations are in full swing for flight-testing of GSLV with indigenous cryogenic engine, a key step to boost the country's confidence in terms of its self-reliance in launch capability, on December 15.
"We have put all our efforts for the development of GSLV", ISRO Chairman K Radhakrishnan said. "The assembly of GSLV is going on at Sriharikota. It started on October 18. Now, the launch is scheduled for December 15th".
The maiden flight testing of the indigenous cryogenic engine and stage conducted in GSLV-D3 on April 15, 2010, failed.
ISRO made another attempt on August 19 this year but the the launch was called off as a leak was observed in the UH25 fuel system of the liquid second stage during the pre-launch pressurisation phase on the vehicle just two hours before the scheduled lift-off.
GSLV is a three stage vehicle. GSLV is 49 metre tall, with 414 tonne lift off weight. First stage comprises S125 solid booster with four liquid (L40) strap-ons. Second stage (GS2) is liquid engine and the third stage (GS3) is a cryostage.
The cryostage is more efficient compared to the liquid stage in PSLV. This means that the thrust developed by burning each kg of propellant is higher in cryo engine, hence can place larger payloads with higher weight into orbit. "Cryo stage as final stage is hence essential for a launcher with higher payload capacity", an ISRO official said.
PSLV is capable of launching 1600 kg satellites in 620 km sun-synchronous polar orbit and 1050 kg satellite in geo-synchronous transfer orbit (GTO).
"This poses a serious limitation on launching communication satellites which are heavier. The GSLV will be capable of launching satellites which are 2000 kg - 2500 kg which matches with the GSAT class of Communication satellites", it was noted.
Currently, India is forced to outsource the heavy launch services from abroad which is not a cost effective solution The establishment of a proven GSLV launcher is the need of the hour. The successful development of indigenous cryostage will boost India's confidence in terms of its self reliance in the launch capability, ISRO officials said.
Preparations in full swing for December 15 GSLV mission - The Economic Times
Compersion
Senior Member
- Joined
- May 6, 2013
- Messages
- 2,258
- Likes
- 923
When will be the launch date for gslv d5 seems by December end.
Mars Orbiter tests have shown our ability to predict: ISRO chairman - great article that touches on Mars orbiter.
Mars Orbiter tests have shown our ability to predict: ISRO chairman - The Hindu
GSLV launch December end
GSLV launch December end | Deccan Chronicle
Mars Orbiter tests have shown our ability to predict: ISRO chairman - great article that touches on Mars orbiter.
Mars Orbiter tests have shown our ability to predict: ISRO chairman - The Hindu
GSLV launch December end
GSLV launch December end | Deccan Chronicle
pmaitra
Senior Member
- Joined
- Mar 10, 2009
- Messages
- 33,262
- Likes
- 19,594
Preparations in full swing for Dec 15 GSLV mission
Source: Preparations in full swing for Dec 15 GSLV mission - Hindustan Times
Free Karma
Senior Member
- Joined
- Oct 3, 2013
- Messages
- 2,372
- Likes
- 2,600
I think it might be delayed just a bit, the chief said End of Dec in one interview
Mars Orbiter tests have shown our ability to predict: ISRO chairman - The Hindu
Might have just said it just to be on the safer side, anyway, we will know the exact date after the mission readiness meeting later today.
| Thread starter | Similar threads | Forum | Replies | Date |
|---|---|---|---|---|
|
GSLV Mark I | Indian Space Program | 0 | |
|
LVM3/GSLV Mark III News, Discussions, Updates and Reports | Indian Space Program | 360 | |
|
Launch: GSLV F14 with INSAT-3DS - 17th February 2024 | Indian Space Program | 20 | |
|
Launch: GSLV F12 with NVS-01 (IRNSS-1J) - 29th May 2023 10:42 IST | Indian Space Program | 29 |
