Author Topic: GSLV MK-III D2 - GSAT-29 - November 14, 2018 (11:38 UTC)  (Read 42246 times)

Offline K210

  • Full Member
  • ***
  • Posts: 321
  • Liked: 69
  • Likes Given: 7
Re: GSAT-29 - GSLV MK-III D2 2018-H1
« Reply #20 on: 05/08/2018 08:45 AM »
GSAT-29 payload has been shipped from SAC to ISAC for integration onto GSAT-29 satellite on 9th May 2018

Source: http://www.sac.gov.in/Vyom/hlist.jsp



 
« Last Edit: 05/10/2018 05:30 AM by K210 »

Offline vineethgk

  • Full Member
  • ****
  • Posts: 871
  • India
  • Liked: 180
  • Likes Given: 265
Re: GSAT-29 - GSLV MK-III D2 2018-H1
« Reply #21 on: 05/13/2018 11:23 PM »
GSLV MkIII D2/GSAT-29 launch likely in 'June or July' says K Sivan

Quote
The chairman said, "Isro is simultaneously working on its next communication satellite Gsat-29. Its launch is due in June or July."

Perhaps this indicates a slip to July.
Source

Offline vineethgk

  • Full Member
  • ****
  • Posts: 871
  • India
  • Liked: 180
  • Likes Given: 265
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #22 on: 05/16/2018 11:26 PM »
Quote
About progress on the GSAT-29 communication satellite, Misra said, “I can only tell you is that GSAT-29 will have an assortment of communication technologies that will be cutting-edge.” A few days ago, the crucial Q and V Band communication payload developed at SAC was flagged off from the campus to be integrated with the GSAT-29 satellite assembled at an Isro centre in south India. “The GSAT-29 will be a boon for our Village Resource Centres (VRC), to bridge the digital divide,” a senior Isro official said.
Source

Offline K210

  • Full Member
  • ***
  • Posts: 321
  • Liked: 69
  • Likes Given: 7
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #23 on: 05/24/2018 08:18 PM »
Quote
The GSLV-MK III mission, planned in July for launch of 4.4 ton satellite will be powered by a liquid core stage L110 stage, which uses two high pressure Vikas engine for combined high thrust

Slip to July is confirmed

Also GTO payload capacity of GSLV MK-3 will be increased to 4.4 tons from D2 mission onwards. The LEO payload capacity should also be increased to around 8.8 tons.

Source: https://timesofindia.indiatimes.com/home/science/lpsc-to-propel-isro-in-developing-light-craft-and-rlv/articleshow/64293342.cms
« Last Edit: 05/24/2018 09:04 PM by K210 »

Offline TheVarun

  • Member
  • Posts: 47
  • CANADA
  • Liked: 1
  • Likes Given: 2
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #24 on: 05/26/2018 05:17 PM »
 Is the 4 tonne satellite weight/mass for the GSLV Mark 3 D-2, confirmed?  If so, excellent!  It would show that ISRO is quite confident of the vehicle, and satisfied with the result of the D-1 mission, that they could raise the satellite weight by 900kgs or more.

Offline K210

  • Full Member
  • ***
  • Posts: 321
  • Liked: 69
  • Likes Given: 7
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #25 on: 05/27/2018 10:37 PM »
Is the 4 tonne satellite weight/mass for the GSLV Mark 3 D-2, confirmed?  If so, excellent!  It would show that ISRO is quite confident of the vehicle, and satisfied with the result of the D-1 mission, that they could raise the satellite weight by 900kgs or more.

The payload for D2 mission GSAT-29 only has a lift off mass of 3,500kg. The 4.4 ton figure in the article refers to the new max GTO capacity not mass of GSAT-29.
« Last Edit: 05/27/2018 10:38 PM by K210 »

Offline worldtimedate

  • Full Member
  • **
  • Posts: 299
    • World TimeDate
  • Liked: 21
  • Likes Given: 8
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #26 on: 05/31/2018 06:45 AM »
Quote
The GSLV-MK III mission, planned in July for launch of 4.4 ton satellite will be powered by a liquid core stage L110 stage, which uses two high pressure Vikas engine for combined high thrust

Slip to July is confirmed

Also GTO payload capacity of GSLV MK-3 will be increased to 4.4 tons from D2 mission onwards. The LEO payload capacity should also be increased to around 8.8 tons.

Source: https://timesofindia.indiatimes.com/home/science/lpsc-to-propel-isro-in-developing-light-craft-and-rlv/articleshow/64293342.cms

Had there been no PSLV fiasco last August 31, this satellite - scheduled to be launched in January, this year - would have been launched by now. But what is attributed to further delay in launching this satellite ? Hasn't the High Thrust Vikas Engine been tested in the GSLV- MK-II mission last March ? Or is it the power supply problem that is holding ISRO from launching it timely ? One launch failure has caused further delay in launching the next mission.

Offline ZachS09

Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #27 on: 05/31/2018 06:30 PM »
Only the vacuum version of HTVE has been tested. The sea level version has yet to be flown.
Because the Falcon Heavy Test Flight was successful, it has inspired thousands of people to consider changing the future of space travel.

Offline russianhalo117

  • Senior Member
  • *****
  • Posts: 4765
  • AR USA / Berlin, DE / Moscow, RF
  • Liked: 1220
  • Likes Given: 598
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #28 on: 05/31/2018 11:28 PM »
Only the vacuum version of HTVE has been tested. The sea level version has yet to be flown.
As mentioned upthread GSAT-29 is undergoing additional tests like GSAT-11 and other satellites awaiting launch due to the satellite anomaly earlier this year.

Offline K210

  • Full Member
  • ***
  • Posts: 321
  • Liked: 69
  • Likes Given: 7
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #29 on: 06/03/2018 03:14 AM »
Quote
The GSLV-MK III mission, planned in July for launch of 4.4 ton satellite will be powered by a liquid core stage L110 stage, which uses two high pressure Vikas engine for combined high thrust

Slip to July is confirmed

Also GTO payload capacity of GSLV MK-3 will be increased to 4.4 tons from D2 mission onwards. The LEO payload capacity should also be increased to around 8.8 tons.

Source: https://timesofindia.indiatimes.com/home/science/lpsc-to-propel-isro-in-developing-light-craft-and-rlv/articleshow/64293342.cms

Had there been no PSLV fiasco last August 31, this satellite - scheduled to be launched in January, this year - would have been launched by now. But what is attributed to further delay in launching this satellite ? Hasn't the High Thrust Vikas Engine been tested in the GSLV- MK-II mission last March ? Or is it the power supply problem that is holding ISRO from launching it timely ? One launch failure has caused further delay in launching the next mission.

Given the problems with GSAT-6A and C39 mission isro is taking a more cautious approach and carrying out extra tests. They recently had GSAT-11 recalled from arainespace so they could subject it to additional tests. They are probably also doing the same for GSAT-29. Also given that GSLV MK-3 is still in development phase they would be carrying out extra tests on the launch vehicle also.

The main reason for the increased launch rate in 2015/2016 was because there was a backlog built up which they were actively clearing. Many of the launches that took place in that time period were actually supposed to take place back in 2012/2013. Regardless things should pickup for isro in the second half of 2018 with numerous payloads completing development and being ready for launch. 

Payloads that should be ready for launch by year end:

- Cartosat-3 (Continuation of Cartosat-2 series)
- RISAT-1A (Repeat of RISAT-1 launched in 2012)
- Oceansat-3 (Next gen replacement for Oceansat-2 launched in 2009)
- HRSAT (Constellation of high res observation sats)
- GSAT-20 (Payload for GSLV MK-3 M-1 mission in 2019)
- Chandraayan-2 (Second moon mission)
- IRNSS-1J/1K (Extra satellites for IRNSS constellation)




Offline worldtimedate

  • Full Member
  • **
  • Posts: 299
    • World TimeDate
  • Liked: 21
  • Likes Given: 8
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #30 on: 06/09/2018 06:34 AM »
Notwithstanding the setback in the PSLV Launch on August 31, 2017 and the snapping up of communication with the GSAT-6 satellite, the silver lining is that the forthcoming launch of GSLV-MK-III D2 will have a payload capacity of 3.7 ton - as confirmed by Dr. K. Sivan - which is an increase by 600 kg from the prior GSLV-MK-III D1 mission launched on June 5, 2017.  Probably in one or two more launches, GSLV-MKIII will reach its peak capability of 4.4 ton, thus making India completely independent of the launching by Arianespace of its heavy communication satellites weighing 4 ton.

Quote
He said, "The first launch of Isro's heaviest rocket GSLV Mk III DI last year carried 3.1 tonne weight. The second launch of Mk III D2, scheduled in July this year and which will carry Gsat-29 satellite, will have the load capability of 3.7 tonnes. We can easily raise the weight up to 4 tonne. With the semicryogenic stage, the same rocket will be able to carry the load up to five tonne. With the increased capability, we don’t have to depend on foreign spaceports to launch our satellites weighing over 5 tonnes."

Source : Isro gets nod for semi-cryogenic engine, will boost GSLV’s lift capability by 1 tonne

--- [ --- ]

Offline K210

  • Full Member
  • ***
  • Posts: 321
  • Liked: 69
  • Likes Given: 7
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #31 on: 06/09/2018 01:17 PM »
Notwithstanding the setback in the PSLV Launch on August 31, 2017 and the snapping up of communication with the GSAT-6 satellite, the silver lining is that the forthcoming launch of GSLV-MK-III D2 will have a payload capacity of 3.7 ton - as confirmed by Dr. K. Sivan - which is an increase by 600 kg from the prior GSLV-MK-III D1 mission launched on June 5, 2017.  Probably in one or two more launches, GSLV-MKIII will reach its peak capability of 4.4 ton, thus making India completely independent of the launching by Arianespace of its heavy communication satellites weighing 4 ton.

Quote
He said, "The first launch of Isro's heaviest rocket GSLV Mk III DI last year carried 3.1 tonne weight. The second launch of Mk III D2, scheduled in July this year and which will carry Gsat-29 satellite, will have the load capability of 3.7 tonnes. We can easily raise the weight up to 4 tonne. With the semicryogenic stage, the same rocket will be able to carry the load up to five tonne. With the increased capability, we don’t have to depend on foreign spaceports to launch our satellites weighing over 5 tonnes."

Source : Isro gets nod for semi-cryogenic engine, will boost GSLV’s lift capability by 1 tonne

--- [ --- ]

If by "Load capability" they mean maximum payload capacity than that is indeed disappointing. MK-3 was intended to have GTO capacity of 4 tons from the start. However it would explain why the inclusion of the SC-200 core would only increase GTO capacity to around 5.5 ton instead of 6.5 ton given the shortfall in base config performance.

Offline Jajar

  • Member
  • Posts: 70
  • Liked: 1
  • Likes Given: 0
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #32 on: 06/11/2018 03:11 PM »
Any news with regards to a tentative launch date ?

Offline worldtimedate

  • Full Member
  • **
  • Posts: 299
    • World TimeDate
  • Liked: 21
  • Likes Given: 8
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #33 on: 06/13/2018 02:43 AM »
If by "Load capability" they mean maximum payload capacity than that is indeed disappointing. MK-3 was intended to have GTO capacity of 4 tons from the start. However it would explain why the inclusion of the SC-200 core would only increase GTO capacity to around 5.5 ton instead of 6.5 ton given the shortfall in base config performance.

It is disappointing to note that ISRO always projects the payload capability of a launch vehicle higher than the initial payload capability of the launch vehicle. This trend was noticed in the development of PSLV, GSLV MK-II, GSLV MK-III and I presume will continue in the development of Semi Cryogenic Engine based UMLV and RLV too. GSLV MK-II - which was supposed to go beyond 2.5 ton payload capability sooner than later, or might reach 3.2 ton because of the uprated Vikas - 2 Engine and the Cryogenic Engine CE-7.5 upgrade - hasn't yet reached the initially projected payload capability of 2.5 ton, in spite of the launch vehicle being under development more than 15-16 years. In the case of PSLV's Sun-synchronous-Orbit payload capacity of 1,750 Kg wasn't attained in a year. It took ISRO many years to attain that payload capacity.

It is more disappointing of GSLV MK-III being a two stage vehicle to have an initial capacity of just 3.1 ton with a massive launch mass of 630 ton. This implies that core stage L110 is not efficient enough to raise the payload capacity. I would've liked GSLV MK-III to have a 3 stage vehicle with another stage propelled by Vikas - 2 engine on top of it.

This is how China's Long March 3B has achieved a payload capacity of 5.2 to 5.5 ton with 3 stage vehicle ( First Stage with 4 boosters ), until they have developed powerful Semi-cryogenic engine YF-100  ( 1200 kn thrust ) and using 2 of them in the boosters – CS-5-300 and cryogenic engine YF--77 ( 700 kN thrust ) and clustering 2 of these YF-77 Cryogenic Engines, they have developed the First stage - CZ-5-500 for Long March 5. Their Long March 5 is a matter of envy to the US, European, Japanese and the Russian Launch Vehicles. But ISRO is hesitant to develop cryogenic engine for the core stage on the excuses that cryogenic propellants are cumbersome to handle with. Despite the initial hiccup, this Long March 5 will sooner or later emerge as a leading Launch vehicle, by surpassing Ariane 5, Delta_IV Heavy, Falcon 9, Soyuz, Zenit, Proton, HIIA etc but only to be surpassed by Falcon Heavy 9 Heavy which I think nothing but a Delta IV heavy type clone with two similar boosters attached around to gain 2 to 3 times payload.

Such is the thrust attainable by Cryogenic Engine that such cumbersomeness in handling the propellants can be compensated for the stupendous amount of payload gain. ISRO’S approach to develop a 2 stage Launch vehicle is fraught from the conception because of the lack of a powerful core stage such Ariane - 5 first stage. Delta IV first stage, Falcon first stage. ISRO spent so many valuable years developing and mastering the cryogenic engine technology against the backdrop of arm-twisting by US technology denial regime through MTCR that gave lot of heartburn to the Indian rocket and missile technologists by forcing them to develop everything from scratch. So, after such toiling work, is it wise of ISRO not to pursue the core stage cryogenic engine development?

--- [ --- ]

Offline sojoner

Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #34 on: 06/13/2018 07:00 AM »
By now we all know in these years how ISRO operates. Being a government run show this is very much excepted. I
would say ISRO is doing a great job despite all red tape and politics. They  should be more focused towards mastering  one of the launch vehicle and payload  capacity  instead of juggling between  MK2,MK3, RLV which really not what expected out of ISRO. Don't  be surprised if GSAT29 slips to August.

Offline input~2

  • Moderator
  • Global Moderator
  • Senior Member
  • *****
  • Posts: 5717
  • Liked: 581
  • Likes Given: 291
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #35 on: 06/16/2018 04:09 PM »
 http://www.thehindu.com/sci-tech/science/isro-plans-next-launch-mission-in-aug/article24175171.ece

Quote
The Indian Space Research Organisation (ISRO) has slated its next launch mission, an Earth observation satellite, tentatively for August. The last one was in April.The upcoming episode will include 25 to 30 small secondary foreign satellites as passengers on the light payload lifting rocket, PSLV-C42.
Does this mean that GSLV MkIII D2 launch is postponed until September?

Offline TheVarun

  • Member
  • Posts: 47
  • CANADA
  • Liked: 1
  • Likes Given: 2
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #36 on: 06/16/2018 04:56 PM »
 Yes, what about that?  GSLV Mark 3 was originally supposed to be launched in May-June. And then July was mentioned. Is this just an oversight by the media, or misunderstanding i.e they mistook "next PSLV launch" for "next launch".   I'm still keeping my fingers crossed for a July lift-off. 

Offline russianhalo117

  • Senior Member
  • *****
  • Posts: 4765
  • AR USA / Berlin, DE / Moscow, RF
  • Liked: 1220
  • Likes Given: 598
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #37 on: 06/17/2018 02:37 AM »
Yes, what about that?  GSLV Mark 3 was originally supposed to be launched in May-June. And then July was mentioned. Is this just an oversight by the media, or misunderstanding i.e they mistook "next PSLV launch" for "next launch".   I'm still keeping my fingers crossed for a July lift-off. 
Actually December 2017 then February and so on.

Offline Jajar

  • Member
  • Posts: 70
  • Liked: 1
  • Likes Given: 0
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #38 on: 06/24/2018 08:43 AM »
I think GSAT-29 won’t be launched until September or even October.

Offline TheVarun

  • Member
  • Posts: 47
  • CANADA
  • Liked: 1
  • Likes Given: 2
Re: GSAT-29 - GSLV MK-III D2 July 2018
« Reply #39 on: 06/25/2018 05:12 PM »
"I think GSAT-29 won’t be launched until September or even October."

 Then there should be a number of launches around that time or before. Besides the PSLV with 30 odd satellites, there's a scheduled GSLV Mark 2 with GSAT-7A, the Chandrayaan-2 mission, plus one more PSLV with an IRNSS. Also, GSAT-11 via Ariane.

Tags: