Author Topic: FAILURE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)  (Read 68342 times)

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #60 on: 08/31/2017 01:31 PM »
Liftoff!
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Chris Bergin

LAUNCH!

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #62 on: 08/31/2017 01:32 PM »
T+1 minute.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #63 on: 08/31/2017 01:32 PM »
T+2 minutes. First stage separation.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Chris Bergin

Solids jettisoned.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #65 on: 08/31/2017 01:34 PM »
T+3 minutes. Second stage performance nominal.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #66 on: 08/31/2017 01:35 PM »
T+4 minutes.

Third stage ignition.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Chris Bergin

Good third stage performance.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #68 on: 08/31/2017 01:36 PM »
T+5 minutes. Third stage performance normal.
« Last Edit: 08/31/2017 01:39 PM by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Galactic Penguin SST

Hmm......have the fairing halves separated at all?  :-\
Chinese spaceflight is a cosmic riddle wrapped in a galactic mystery inside an orbital enigma... - (not) Winston Churchill

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #70 on: 08/31/2017 01:37 PM »
T+6 minutes.

Third stage burnout.
« Last Edit: 08/31/2017 01:39 PM by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #71 on: 08/31/2017 01:38 PM »
T+7 minutes. Velocity is a little low.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #72 on: 08/31/2017 01:39 PM »
T+8 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #73 on: 08/31/2017 01:40 PM »
T+9 minutes. PS4 ignition.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline eeergo

No, looks like it's falling in altitude?
« Last Edit: 08/31/2017 01:42 PM by eeergo »
-DaviD-

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #75 on: 08/31/2017 01:41 PM »
T+10 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #76 on: 08/31/2017 01:42 PM »
T+11 minutes.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Offline AJA

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #77 on: 08/31/2017 01:42 PM »
Hmm......have the fairing halves separated at all?  :-\

I was looking at that too. On one of the other camera angles, you can see a monitor in the Flight Control Room that shows the satellite, and the fairing. And that doesn't look like it's separated.

It'd make sense for the under-performance. (Added fairing weight, even with nominal stage burn)

Haven't wanted to be wrong in a while now, but I am.
« Last Edit: 08/31/2017 01:43 PM by AJA »

Online Chris Bergin

The overlaps seem off?

Offline Steven Pietrobon

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Re: LIVE: IRNSS-1H, PSLV C39, SLP, August 31, 2017 (13:30 UTC)
« Reply #79 on: 08/31/2017 01:43 PM »
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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