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  Soyuz TMA-12M: Viewing, comments, questions

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Author Topic:   Soyuz TMA-12M: Viewing, comments, questions
Robert Pearlman
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Posts: 29264
From: Houston, TX
Registered: Nov 1999

posted 03-25-2014 07:48 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
Soyuz TMA-12M: mission viewing, questions, comments
This thread is intended for comments and questions about the Soyuz TMA-12M mission and the updates published under the topic: Soyuz TMA-12M mission to the space station.

Soyuz TMA-12M launched March 25, 2014 with three crewmembers for Expedition 39/40 on the International Space Station: Roscosmos cosmonauts Alexander Skvortsov and Oleg Artemyev, together with NASA astronaut Steve Swanson.

TMA-12M is the 121st flight of a Soyuz spacecraft since its first flight in 1967.

Robert Pearlman
Editor

Posts: 29264
From: Houston, TX
Registered: Nov 1999

posted 03-25-2014 07:52 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
From Rick Mastracchio on Twitter:
Just saw the Soyuz launch from station. Great view. In 6 hours we will have new crew members.

Robert Pearlman
Editor

Posts: 29264
From: Houston, TX
Registered: Nov 1999

posted 03-25-2014 08:28 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
The arrival of Soyuz TMA-12M at the International Space Station, which had been planned for six hours after its launch on Tuesday, will now take place on Thursday night (March 27), the result of a missed engine firing.

Flight controllers at Russia's Mission Control Center outside Moscow have reverted the flight to the backup 34-orbit rendezvous, which has re-targeted the docking for 6:58 p.m. CDT (2358 GMT).

This longer rendezvous was the standard flight profile until last year; Soyuz TMA-12M would have been only the fifth mission to follow the accelerated timeline.

As the TMA-12M crew follows the revised schedule, flight controllers are reviewing the data to determine why the third thruster burn did not occur as expected. Initial information indicates the spacecraft may not have been in the proper orientation.

JBoe
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From: Edgewater, MD, USA
Registered: Oct 2012

posted 03-26-2014 03:43 PM     Click Here to See the Profile for JBoe   Click Here to Email JBoe     Edit/Delete Message   Reply w/Quote
Has there been any updates regarding the missed burn?

Robert Pearlman
Editor

Posts: 29264
From: Houston, TX
Registered: Nov 1999

posted 03-26-2014 04:07 PM     Click Here to See the Profile for Robert Pearlman   Click Here to Email Robert Pearlman     Edit/Delete Message   Reply w/Quote
NASA's Kenny Todd, the space station mission operations integration manager, provided an update today on NASA TV (see video below).
Based on what we're hearing from our Russian colleagues, it looks like that burn did not execute because they weren't able, through their normal systems, to confirm the attitude of the vehicle was at its proper condition. And so not being able to confirm that, basically the burn did not automatically execute.

All times are CT (US)

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