Soyuz Launch Conflict

What is the problem to postpone the Soyuz launch a couple of days in context
of an international partnership as ISS seems to be ?

Albert

Albert Blauensteiner wrote:
What is the problem to postpone the Soyuz launch a couple of days in context
of an international partnership as ISS seems to be ?


NASA doesn't want other vehicles to be moving around its shuttle.

While this is perhaps no longer such an issue, in the past, a soyuz
docking at zarya would be awfully close to the shuttle's tail and the
soyuz wouldn't really know it was there.

There is also a question of ECLSS capacity. With a shuttle crew, the
station is already strained for ECLSS capacity, adding 3 more from the
soyuz would make the station very crowded.

Albert Blauensteiner wrote:
What is the problem to postpone the Soyuz launch a couple of days in context
of an international partnership as ISS seems to be ?

One issue that arises is the on-orbit lifetime of the Soyuz. It can't
stay up there for too long before it exceeds its certification. I don't
know how close they are to that.... Even if the specific date isn't
immediate, I can imagine folks don't want to start taking days away when
it's not necessary.

--
Darren

John Doe wrote:

Albert Blauensteiner wrote:
What is the problem to postpone the Soyuz launch a couple of days in context
of an international partnership as ISS seems to be ?


NASA doesn't want other vehicles to be moving around its shuttle.

While this is perhaps no longer such an issue, in the past, a soyuz
docking at zarya would be awfully close to the shuttle's tail and the
soyuz wouldn't really know it was there.

This isn't the issue.

There is also a question of ECLSS capacity. With a shuttle crew, the
station is already strained for ECLSS capacity, adding 3 more from the
soyuz would make the station very crowded.

Nor is this.

The issue is that with both vehicles docked, there is simply too much
going on in too confined a space and timeline.

D.
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Oct 5th, 2004 JDL

Its not just this though, there are phasing issues for launching Shuttles
and Soyuz to consider as well.
Brian

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"John Doe" wrote in message
...
Albert Blauensteiner wrote:
What is the problem to postpone the Soyuz launch a couple of days in
context
of an international partnership as ISS seems to be ?


NASA doesn't want other vehicles to be moving around its shuttle.

While this is perhaps no longer such an issue, in the past, a soyuz
docking at zarya would be awfully close to the shuttle's tail and the
soyuz wouldn't really know it was there.

There is also a question of ECLSS capacity. With a shuttle crew, the
station is already strained for ECLSS capacity, adding 3 more from the
soyuz would make the station very crowded.

On Fri, 13 Mar 2009 17:39:42 GMT, (Darren Dunham)
wrote:

What is the problem to postpone the Soyuz launch a couple of days in context
of an international partnership as ISS seems to be ?

One issue that arises is the on-orbit lifetime of the Soyuz. It can't
stay up there for too long before it exceeds its certification. I don't
know how close they are to that....

I've heard the limit is 200 days, which would be April 30 for Soyuz
TMA-13. The Russians probably have an earlier cut-off to allow for
emergencies.

Brian