Why can't Soyuz dock while a shuttle is present?

Quoting http://spaceflightnow.com/shuttle/sts115/060827postmmt/ --

"As it now stands, Atlantis must launch by Sept. 7 to complete its
docked mission and depart before arrival of the Soyuz."

What's the rationale behind this constraint? Orientation or thermal
issues, perhaps, or insufficient life support on ISS to accomodate
visiting Soyuz and shuttle crews at the same time? Something else?

Just curious... another source also mentioned a mandatory 1-day interval
between shuttle undock and Soyuz arrival, but didn't explain the reason.
--
Jordan.

The main ossue that I've been told about
is ISS crew attention. They need to devote
100% of their time to Soyuz since they are
performing a crew handover.

Also, the two visiting crews are on different
time zones and the ISS crew must sleep shift
between them to get in chrono-sync.



"Jordan Hazen" wrote in message
...
Quoting http://spaceflightnow.com/shuttle/sts115/060827postmmt/ --

"As it now stands, Atlantis must launch by Sept. 7 to complete its
docked mission and depart before arrival of the Soyuz."

What's the rationale behind this constraint? Orientation or thermal
issues, perhaps, or insufficient life support on ISS to accomodate
visiting Soyuz and shuttle crews at the same time? Something else?

Just curious... another source also mentioned a mandatory 1-day interval
between shuttle undock and Soyuz arrival, but didn't explain the reason.
--
Jordan.

(Jordan Hazen) wrote in news:1156750371.296932
@coelacanth.aug.com:

Quoting http://spaceflightnow.com/shuttle/sts115/060827postmmt/ --

"As it now stands, Atlantis must launch by Sept. 7 to complete its
docked mission and depart before arrival of the Soyuz."

What's the rationale behind this constraint? Orientation or thermal
issues, perhaps, or insufficient life support on ISS to accomodate
visiting Soyuz and shuttle crews at the same time? Something else?

Just curious... another source also mentioned a mandatory 1-day interval
between shuttle undock and Soyuz arrival, but didn't explain the reason.

In addition to the issues Jim mentioned, in the event of a Kurs failure the
Soyuz will initiate an automatic collision-avoidance maneuver that stands a
decent chance of hitting the orbiter if it happens close to ISS, since the
Soyuz software doesn't "know" the orbiter is there and the orbiter extends
well beyond the plane of the Soyuz docking ports.

--
JRF

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check "Organization" (I am not assimilated) and
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Has this ever happened, or has the Soyuz crew
always taken manual control and made the docking?
I can't recall any such case of a Soyuz docking being
aborted out of the hands of the crew.

"Jorge R. Frank" wrote
In addition to the issues Jim mentioned, in the event of a Kurs failure
the
Soyuz will initiate an automatic collision-avoidance maneuver that stands
a
decent chance of hitting the orbiter if it happens close to ISS, since the
Soyuz software doesn't "know" the orbiter is there and the orbiter extends
well beyond the plane of the Soyuz docking ports.

A Soyuz did crash into the Mir once, although it was unmanned. Probably
enough though to raise the hairs on the back of people's necks about Soyuz
maneuvers.

"Jim Oberg" wrote in message
...
Has this ever happened, or has the Soyuz crew
always taken manual control and made the docking?
I can't recall any such case of a Soyuz docking being
aborted out of the hands of the crew.

"Jorge R. Frank" wrote
In addition to the issues Jim mentioned, in the event of a Kurs failure
the
Soyuz will initiate an automatic collision-avoidance maneuver that stands
a
decent chance of hitting the orbiter if it happens close to ISS, since
the
Soyuz software doesn't "know" the orbiter is there and the orbiter
extends
well beyond the plane of the Soyuz docking ports.

nope. garbled.


"cole smith" wrote in message
...
A Soyuz did crash into the Mir once, although it was unmanned. Probably
enough though to raise the hairs on the back of people's necks about Soyuz
maneuvers.

cole smith wrote:

A Soyuz did crash into the Mir once, although it was unmanned. Probably
enough though to raise the hairs on the back of people's necks about Soyuz
maneuvers.

The Progress was being remotely controlled without the use of Radar and
with MIR crews that had not received adequate training for this TEST.

"Jorge R. Frank" wrote in message
...
(Jordan Hazen) wrote in news:1156750371.296932
@coelacanth.aug.com:

Quoting http://spaceflightnow.com/shuttle/sts115/060827postmmt/ --

"As it now stands, Atlantis must launch by Sept. 7 to complete its
docked mission and depart before arrival of the Soyuz."

What's the rationale behind this constraint? Orientation or thermal
issues, perhaps, or insufficient life support on ISS to accomodate
visiting Soyuz and shuttle crews at the same time? Something else?

Just curious... another source also mentioned a mandatory 1-day interval
between shuttle undock and Soyuz arrival, but didn't explain the reason.

In addition to the issues Jim mentioned, in the event of a Kurs failure
the
Soyuz will initiate an automatic collision-avoidance maneuver that stands
a
decent chance of hitting the orbiter if it happens close to ISS, since the
Soyuz software doesn't "know" the orbiter is there and the orbiter extends
well beyond the plane of the Soyuz docking ports.

But they should still be able to physically dock the Shuttle AFTER a Soyuz,
correct?

(barring the logistical reasons you give.)



--
JRF

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check "Organization" (I am not assimilated) and
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"Jim Oberg" wrote in
:

Has this ever happened, or has the Soyuz crew
always taken manual control and made the docking?
I can't recall any such case of a Soyuz docking being
aborted out of the hands of the crew.

Not recently. I do recall some older accounts of Soyuz rendezvous being
"terminated in the automatic mode" or some such. I'm pretty sure the crew
can prevent the auto-abort simply by taking over manually.


--
JRF

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"Greg D. Moore \(Strider\)" wrote in
ink.net:

But they should still be able to physically dock the Shuttle AFTER a
Soyuz, correct?

Yes, a shuttle can dock or undock regardless of the Soyuz/Progress
configuration at the station. The reverse isn't true; joint flight rules
prohibit a Soyuz or Progress docking or undocking with a shuttle present.


--
JRF

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