Author Topic: Gaganyaan TV-D1 - FLP - 21 October 2023 (04:30 UTC)  (Read 30794 times)

Online Steven Pietrobon

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #40 on: 10/21/2023 02:59 am »
Range is ready for launch.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Steven Pietrobon

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #41 on: 10/21/2023 03:00 am »
T-15 minutes. Mission Director has given key authorisation.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #42 on: 10/21/2023 03:04 am »
T-12 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #43 on: 10/21/2023 03:05 am »
Automatic launch sequence initiated.

T-10 minutes.
« Last Edit: 10/21/2023 03:05 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #44 on: 10/21/2023 03:10 am »
T-5 minutes.

Integration video.
« Last Edit: 10/21/2023 03:12 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #45 on: 10/21/2023 03:13 am »
T-3 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #46 on: 10/21/2023 03:14 am »
More integration video.
« Last Edit: 10/21/2023 03:17 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #47 on: 10/21/2023 03:15 am »
T-2 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #48 on: 10/21/2023 03:15 am »
T-1 minute.

Hold at T-5 seconds.
« Last Edit: 10/21/2023 03:24 am by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #49 on: 10/21/2023 03:17 am »
There is a hold. We'll come back shortly.
« Last Edit: 10/21/2023 04:04 am by zubenelgenubi »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #50 on: 10/21/2023 03:20 am »
There was a puff of propellants and some flame.

The launch delay was due to weather. Engine ignition did not happen normally. Onboard computer aborted the launch. Launch to be rescheduled after the anomaly investigation.

End of webcast.
« Last Edit: 10/21/2023 04:04 am by zubenelgenubi »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #51 on: 10/21/2023 03:22 am »
It looks like there was ignition.
« Last Edit: 10/21/2023 04:04 am by zubenelgenubi »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #52 on: 10/21/2023 03:23 am »
It looks like there was ignition.

Mentioned some GSE computer sequencing pick up an out value out of range.  Need more analysis.

« Last Edit: 10/21/2023 04:03 am by zubenelgenubi »
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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #53 on: 10/21/2023 03:30 am »
« Last Edit: 10/21/2023 04:03 am by zubenelgenubi »
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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #54 on: 10/21/2023 03:37 am »
Quote
The lift of attempt of VD one could not happen today.

The initially the launch was scheduled at 8 o'clock 8:00 AM.

There was a postponement of the liftoff time to 845 due to weather situation and we had a very smooth ALS the automatic launch.

Sequence leading up to the command to lift off the engine.

But the engine ignition has not happened in the nominal course.

We have to find out what went wrong with that.

The all the entire vehicle is very safe.

We will have to reach the vehicle and then look at what has happened now.

We will come back soon after analyzing what has triggered the automatic launch sequence holding the vehicle.

So what has happened is the onboard the computer which is doing this function the ground checkout.

Computer which is doing the function as withheld the launch in view of the anomaly observed.

So we will come back with the anomaly, understanding and correct it and schedule the launch very soon.

That will be announced a little later after the analysis is completed.
« Last Edit: 10/21/2023 04:03 am by zubenelgenubi »
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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #55 on: 10/21/2023 03:45 am »
"TV D1 Test Flight
Liftoff attempt couldn't be completed.
Updates will follow."

https://twitter.com/isro/status/1715573083677888970
« Last Edit: 10/21/2023 04:01 am by zubenelgenubi »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

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Re: ABORT: Gaganyaan TV-D1 - FLP - 21 October 2023 (03:15 UTC)
« Reply #56 on: 10/21/2023 04:00 am »
It looks like there was ignition.
Mentioned some GSE computer sequencing pick up an out value out of range.  Need more analysis.
See the "big screen" content.  Launch aborted after ignition but before liftoff.

TV ENGINE START  00:06  green
LHRS RELEASE       00:00   red
« Last Edit: 10/21/2023 04:08 am by zubenelgenubi »
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https://twitter.com/isro/status/1715580002601996288
Quote
Reason for the launch hold is identified and corrected.

The launch is planned at 10:00 Hrs. today.

Recycled for another attempt at 04:30 UTC!
« Last Edit: 10/21/2023 04:19 am by zubenelgenubi »
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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (04:30 UTC)
« Reply #58 on: 10/21/2023 04:21 am »
Quote from: ISRO tweet
Reason for the launch hold is identified and corrected.

The launch is planned at 10:00 Hrs. today.

Recycled for another attempt at 04:30 UTC!
Are the livestreams returning?  I checked one a minute ago--not currently live.  Rescheduled launch is in nine minutes!
« Last Edit: 10/21/2023 04:26 am by zubenelgenubi »
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Re: Gaganyaan TV-D1 - FLP - 21 October 2023 (04:30 UTC)
« Reply #59 on: 10/21/2023 04:23 am »
https://twitter.com/isro/status/1715580002601996288
Quote
Reason for the launch hold is identified and corrected.

The launch is planned at 10:00 Hrs. today.

Recycled for another attempt at 04:30 UTC!

Within the next hour?
Tony De La Rosa, ...I'm no Feline Dealer!! I move mountains.  but I'm better known for "I think it's highly sexual." Japanese to English Translation.

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