Author Topic: LIVE: Soyuz-2-1A - Progress MS-07 Events - October 14 onwards, 2017  (Read 16226 times)

Offline Steven Pietrobon

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NASA still waiting for further word from the Russians.
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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MCC-H.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Chris Bergin

It'll be a scrub for the day, that we know at least.

Online DaveS

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Abort/cut off occurred after the separation of the first umbilical tower but prior to the separation of the second/final umbilical tower. This could have something to to do with the cut off. Maybe it's a case of command sent but not executed so a automatic cut off was initiated.
« Last Edit: 10/12/2017 09:41 AM by DaveS »
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Offline centaurinasa

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Not sure but it seems that's the first Progress launch aborted....

Offline Steven Pietrobon

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Abort/cut off occurred after the separation of the first umbilical tower but prior to the separation of the second/final umbilical tower.

Yes, you can see the second tower still attached behind the rocket.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online FutureSpaceTourist

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NASA confirmation of SCRUB for the day.

Online FutureSpaceTourist

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New NET Saturday 14th. No reason yet for launch delay.

Edit to add: 3:46am CT, 2:46pm Local.

Would mean 2 day rendevous with docking on Monday.
« Last Edit: 10/12/2017 09:44 AM by FutureSpaceTourist »

Offline Steven Pietrobon

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NASA confirming that the flight has been scrubbed. Delayed to no earlier to Saturday 14 October. No reason give yet.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Chris Bergin

Never seen this before! They turned off the main screens at MCC-M!

Next launch opportunity is Saturday. 9:46 UTC - if they can correct the issue.

Offline Steven Pietrobon

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Next available time is at 3:46:53 CDT, 08:46:53 UTC.
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online Galactic Penguin SST

The abort seems to be at the exact same moment as in the last Soyuz rocket abort in March last year, which I remember to be related to engine start-up issues.  ;)

Edit: The problem last year was related to one of the pyrotechnic igniters failing to activate at T-10 seconds. At that time LOX had yet to be poured into the combustion chambers so a 24 hours turn around was done.
« Last Edit: 10/12/2017 09:58 AM by Galactic Penguin SST »
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Offline A12

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Next available time is at 3:46:53 CDT, 08:46:53 UTC.

Did the scrub ruin the two-orbit planned maneuver?
« Last Edit: 10/12/2017 09:49 AM by A12 »

Offline Steven Pietrobon

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NASA has ended their coverage. Tsenki have also ended their coverage.
« Last Edit: 10/12/2017 09:50 AM by Steven Pietrobon »
Akin's Laws of Spacecraft Design #1:  Engineering is done with numbers.  Analysis without numbers is only an opinion.

Online DaveS

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Next available time is at 3:46:53 CDT, 08:46:53 UTC.

Did the scrub ruin the two-orbit planned manuever?
Yes. Saturday's launch opportunity is for a 34 orbit rendezvous (2.5 day rendezvous profile). So it is not the Rapid Rendezvous Profile which is 4 orbits/6 hours.
"For Sardines, space is no problem!"
-1996 Astronaut class slogan

"We're rolling in the wrong direction but for the right reasons"
-USA engineer about the rollback of Discovery prior to the STS-114 Return To Flight mission

Online DaveS

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Did the scrub ruin the two-orbit planned manuever?

Yes, but only for today. They may try again next Saturday.


Nope. The 2 orbit rendezvous profile require certain orbital conditions to be present, mainly phase angle. On Saturday the phase angle is too large so they have default back to the standard rendezvous profile that takes two days.
"For Sardines, space is no problem!"
-1996 Astronaut class slogan

"We're rolling in the wrong direction but for the right reasons"
-USA engineer about the rollback of Discovery prior to the STS-114 Return To Flight mission

Offline eeergo

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When would the next 2-orbit rendezvous window be? Would they want to delay MS-07 further to be able to try the new fast-track?
-DaviD-

Online DaveS

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When would the next 2-orbit rendezvous window be? Would they want to delay MS-07 further to be able to try the new fast-track?
I think that would have execute another ISS orbital correction maneuver for that. The problem with that is that they usually do one burn to set things up for multiple VV arrivals/departures. Doing one now would screw other ones just for this one experiment. So they'll either have to wait until things naturally sets things up again or wait until the next available maneuver opportunity.

This is why they do these periodic reboosts, they're not required from an orbital lifetime perspective but rather required to set things up for arrivals/departures.
"For Sardines, space is no problem!"
-1996 Astronaut class slogan

"We're rolling in the wrong direction but for the right reasons"
-USA engineer about the rollback of Discovery prior to the STS-114 Return To Flight mission

Online Chris Bergin

Good work with the coverage everyone!

Updated Chris Gebhardt's article to where we are and what we've missed out on:
https://www.nasaspaceflight.com/2017/10/progress-ms-07-two-orbit-rendezvous-mission/

Offline Ben the Space Brit

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Did the scrub ruin the two-orbit planned manuever?

Yes, but only for today. They may try again next Saturday.

Nope. The 2 orbit rendezvous profile require certain orbital conditions to be present, mainly phase angle. On Saturday the phase angle is too large so they have default back to the standard rendezvous profile that takes two days.

I'm guessing that this will require reprogramming of the Progress's navigation computer for the new post-seperation flight profile? Will they need to roll back to do that?
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