[FPSPACE] Today's Soyuz landing -- UT computation error
joberg at houston.rr.com
Sat Apr 8 12:08:26 EDT 2006
The undocking/landing EDT times are off the NASA release,
the UT times are in error by 1 hour, my bad.
a.. Soyuz TMA-7/11S-ISS hatch closing ~17:12 UT (1:12pm EDT)
a.. Soyuz TMA-7/11S undocking 20:28 UT (4:28pm EDT)
a.. Soyuz TMA-7/11S landing 23:46 UT (7:46pm EDT) (about an hour before
sunrise in Kazakhstan)
----- Original Message -----
From: "Jim Oberg" <joberg at houston.rr.com>
To: <fpspace at friends-partners.org>
Sent: Saturday, April 08, 2006 7:44 AM
Subject: [FPSPACE] Today's Soyuz landing
> The following reference data on today's landing:
> a.. Soyuz TMA-7/11S-ISS hatch closing ~17:12 UT (1:12pm EDT)
> a.. Soyuz TMA-7/11S undocking 21:28 UT (4:28pm EDT)
> a.. Soyuz TMA-7/11S landing 00:46 UT (7:46pm EDT) (about an hour before
> sunrise in Kazakhstan)
> What will the Soyuz TMA-7/11S crew (Exp. 12 + Carlos Pontes) experience
> during their reentry/descent?
> For the reentry, all crewmembers are wearing the Russian Kentavr anti-G
> suit. [The Kentavr garment is a protective anti-g suit ensemble to
> facilitate the return of a long-duration crewmember into the Earth
> gravity. Consisting of shorts, gaiters, underpants, jersey and socks, it
> acts as countermeasure for circulatory disturbance, prevents crewmember
> from overloading during descent and increases orthostatic tolerance during
> post-flight adaptation. Russian crewmembers are also advised to ingest
> fluid-electrolyte additives, viz., three sodium chloride tablets during
> breakfast and after the midday meal, each time with 300 ml of fluid, and
> two pills during the meal aboard Soyuz before deorbit.]
> Before descent:
> Special attention will be paid to the need for careful donning of the
> medical belt with sensors and securing tight contact between sensors and
> During preparation for descent, before atmosphere reentry, crewmembers
> settle down comfortably in the Kazbek couches, fasten the belts, securing
> tight contact between body and the seat liner in the couch.
> During de-orbit:
> Dust particles starting to sink in the Descent Module (DM) cabin is the
> first indication of atmosphere reentry and beginning of G-load effect.
> From that time on, special attention is required as the loads increase
> Under G-load effect during atmosphere reentry the crew expects the
> following experience:
> Sensation of G-load pressure on the body, burden in the body, labored
> breathing and speech. These are normal sensations, and the advice is to
> "take them coolly". In case of the feeling of a lump in the throat, this
> is no cause to "be nervous". This is frequent and should not be fought.
> Best is to "try not to swallow and talk at this moment". Crew should
> check vision and, if any disturbances occur, create additional tension of
> abdominal pressure and leg muscles (strain abdomen by pulling in), in
> addition to the Kentavr anti-G suit.
> During deployment of pilot (0.62 & 4.5 square meters), drogue (16 sq.m.)
> and main (518 sq.m.) parachutes the impact accelerations will be perceived
> as a "strong snatch". No reason to become concerned about this but one
> should be prepared that during the parachutes deployment and change
> ("rehook") of prime parachute to symmetrical suspension, swinging and
> spinning motion of the DM occurs, which involves vestibular (middle ear)
> It is important to tighten restrain system to fasten pelvis and pectoral
> Vestibular irritation can occur in the form of different referred
> sensations such as vertigo, hyperhidrosis, postural illusions, general
> discomfort and nausea. To prevent vestibular irritation the crew should
> "limit head movement and eyes movement", as well as fix their sight on
> motionless objects.
> Just before the landing (softened by six small rocket engines behind the
> heat shield):
> Crew will be prepared for the vehicle impact with the ground, with their
> bodies fixed along the surface of the seat liner in advance. "Special
> attention should be paid to arm fixation to avoid the elbow and hand
> squat" (instruction).
> Landing speed: ~9.9 m/sec.
> After landing:
> Crew should not get up quickly from their seats to leave the DM. They were
> advised to stay in the couch for several minutes and only then stand up.
> In doing that, they should limit head and eyes movement and avoid
> excessive motions, proceeding slowly. They and their body should not take
> up earth gravity in the upright position too quickly.
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