Author Topic: LIVE: GSLV F-08 - GSAT-6A - March 29, 2018 (11:26 UTC)  (Read 52464 times)

Offline K210

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #20 on: 03/23/2018 01:46 pm »
Pictures of GSLV-F08 being moved to launch pad


Online ZachS09

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #21 on: 03/23/2018 03:55 pm »
I hope there will be a webcast for this GSLV mission because there wasn’t one the last time GSLV went up.
« Last Edit: 03/23/2018 04:03 pm by ZachS09 »
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline vineethgk

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #22 on: 03/24/2018 12:42 am »
I hope there will be a webcast for this GSLV mission because there wasn’t one the last time GSLV went up.
I guess it should be there, considering that they have released pictures of the rocket well ahead of time. Last time round the govt mandated a blackout for F09/GSAT-9 mission for whatever reason, and they did not release pictures or brochure until after launch. GSAT-6A is meant exclusively for the military like its predecessor GSAT-6, yet we had normal live coverage for latter's launch.

Offline TheVarun

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #23 on: 03/24/2018 12:32 pm »
Any details about the upgraded Cryogenic engine/stage for this vehicle?

Offline Jajar

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #24 on: 03/24/2018 01:15 pm »
Noticed that in one of the pictures of the rocket being rolled to the launchpad, the second vehicle assembly building is almost completed ?

Online ZachS09

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #25 on: 03/24/2018 02:02 pm »
Noticed that in one of the pictures of the rocket being rolled to the launchpad, the second vehicle assembly building is almost completed ?

Looks that way to me.
Liftoff for St. Jude's! Go Dragon, Go Falcon, Godspeed Inspiration4!

Offline vineethgk

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #26 on: 03/25/2018 03:01 am »
Noticed that in one of the pictures of the rocket being rolled to the launchpad, the second vehicle assembly building is almost completed ?

Looks that way to me.
Interior works like fitting the platforms, cranes, electrical connections etc might still be pending. Perhaps it will be ready for operations by the end of this year.

Offline vineethgk

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #27 on: 03/25/2018 03:09 am »
Any details about the upgraded Cryogenic engine/stage for this vehicle?
Assuming the satellite mass is ~2200 kg as reported earlier I doubt if they would need to use an upgraded cryo stage for this flight. Perhaps we will see that for Chandrayaan-II flight in October.

Offline K210

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #28 on: 03/25/2018 07:40 am »
Any details about the upgraded Cryogenic engine/stage for this vehicle?

We wont know until isro publishes the mission brochure

Offline Star One

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #29 on: 03/25/2018 09:14 am »
Any details about the upgraded Cryogenic engine/stage for this vehicle?
Assuming the satellite mass is ~2200 kg as reported earlier I doubt if they would need to use an upgraded cryo stage for this flight. Perhaps we will see that for Chandrayaan-II flight in October.

Would they really be trying out an upgraded stage on such a heigh profile launch, would seem unlikely judging by past caution shown.

Offline russianhalo117

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #30 on: 03/25/2018 01:13 pm »
Any details about the upgraded Cryogenic engine/stage for this vehicle?
Assuming the satellite mass is ~2200 kg as reported earlier I doubt if they would need to use an upgraded cryo stage for this flight. Perhaps we will see that for Chandrayaan-II flight in October.

Would they really be trying out an upgraded stage on such a heigh profile launch, would seem unlikely judging by past caution shown.
Correct we know that ISRO plans to debut an upgraded stage this year, but we don't know the flight.

Offline vineethgk

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #31 on: 03/25/2018 02:14 pm »
Any details about the upgraded Cryogenic engine/stage for this vehicle?
Assuming the satellite mass is ~2200 kg as reported earlier I doubt if they would need to use an upgraded cryo stage for this flight. Perhaps we will see that for Chandrayaan-II flight in October.

Would they really be trying out an upgraded stage on such a heigh profile launch, would seem unlikely judging by past caution shown.
Correct we know that ISRO plans to debut an upgraded stage this year, but we don't know the flight.
There was a previous report that hinted that an 'upgraded GSLV MkII' would be used for CY-II mission, possibly making its debut. But I'm not sure whether rocket in its current configuration is quite capable of deploying CY-II stack weighing ~3.2 tonnes to its targeted parking orbit (though at 180x19000 km it is a lot lower than a standard GTO), or if it would require the upgrades.
« Last Edit: 03/25/2018 02:16 pm by vineethgk »

Offline TheVarun

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #32 on: 03/25/2018 03:52 pm »
Any details about the upgraded Cryogenic engine/stage for this vehicle?
Assuming the satellite mass is ~2200 kg as reported earlier I doubt if they would need to use an upgraded cryo stage for this flight. Perhaps we will see that for Chandrayaan-II flight in October.

  Makes sense! But I was thinking that, since the Chandrayaan-2 spacecraft weighs more than 3000kg, they would definitely need to use an upgraded cryogenic engine/stage to lift it into space. And they would prefer to test such an uprated engine in an actual flight first. Hence, the real possibility of an upgraded cryo for the GSAT-6A, even though that weighs only 2140 kg. They can evaluate several parameters of the engine, before employing it on Chandrayaan.

Offline vineethgk

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #33 on: 03/26/2018 01:16 am »
GSAT-6A to enable mobile communication via handheld terminals for the Armed forces
Quote
GSAT-6A will complement GSAT-6, which has been orbiting since August 2015 at 83 degrees East longitude.
Quote
A special feature of the GSAT-6A is its 6-metre-wide umbrella-like antenna, which will be unfurled in once it is in space
Quote
The unfurl-able antenna, hand-held ground terminals, and network management techniques could be useful in future satellite-based mobile communication applications. GSAT-6A will also have a smaller 0.8-metre antenna for communication in the C band.

I guess one cannot hope to give greater publicity to military satellite launches than the way ISRO does. ;)
« Last Edit: 03/26/2018 01:22 am by vineethgk »

Offline K210

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #34 on: 03/26/2018 07:14 am »
If the upgraded C-15 upper stage does not make a appearance this launch then i think it is safe to say it has been delayed to F-11 or F-12 missions planned for 2019. I dont think isro will carry out such a large upgrade and take such high risks on chandraayan-2 launch given that a entire decade of effort has gone into it.

The current GSLV is powerful enough to inject the 3290 kg chandraayan-2 stack into a 180 x 18000 km parking orbit.

Offline Jajar

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Offline K210

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #36 on: 03/26/2018 07:24 am »
GSAT-6A to enable mobile communication via handheld terminals for the Armed forces
Quote
GSAT-6A will complement GSAT-6, which has been orbiting since August 2015 at 83 degrees East longitude.
Quote
A special feature of the GSAT-6A is its 6-metre-wide umbrella-like antenna, which will be unfurled in once it is in space
Quote
The unfurl-able antenna, hand-held ground terminals, and network management techniques could be useful in future satellite-based mobile communication applications. GSAT-6A will also have a smaller 0.8-metre antenna for communication in the C band.

I guess one cannot hope to give greater publicity to military satellite launches than the way ISRO does. ;)

Out of all government run space agencies i think isro is most open about military payloads/launches

Offline K210

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #37 on: 03/26/2018 12:10 pm »
Mission brochure is out!


Offline vineethgk

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #38 on: 03/26/2018 12:24 pm »
From the brochure, they have incorporated the improved High Thrust Vikas - HTVE - in GS2 stage (but not the four L40 strapons). The cryogenic GS3 stage appears to have been left unenhanced for now.

Offline vineethgk

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Re: GSAT-6A GSLV F-08 March 29, 2018 (11:26 UTC)
« Reply #39 on: 03/26/2018 03:47 pm »
From the brochures of one of the previous flights (D6/GSAT-6), the peak thrust of GS2 stage was 799 kN. With the incorporation of High Thrust Vikas Engine (HTVE) in this flight, it has increased now to ~847 kN.

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