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NASA HSF News Digest V1 #12


NASA HSF News Digest   Wednesday, February 20 2002   Volume 01 : Number

	2002 International Space Station Status Report #10

Date: Wed, 20 Feb 2002 15:53:03 -0600 (CST)
From: info@jsc.nasa.gov
Subject: 2002 International Space Station Status Report #10

Report # 10 
 4 p.m. CST, Wednesday, Feb. 20, 2002 
 Expedition Four Crew 
 Expedition 4 astronauts Carl Walz and Dan Bursch completed a successful
5-hour, 47-minute spacewalk Wednesday, testing equipment and procedures
for the Airlock Quest and performing other tasks to prepare for Space
Shuttle Atlantisí STS-110 mission to the International Space Station in
April. The spacewalk, which began at 5:38 a.m. CST and ended at 11:25
a.m., notched some firsts.

It was the first spacewalk from Quest without the presence of a space
shuttle at the station, earning it the designation of U.S. EVA 1.  It
also marked the first U.S. use of an Intravehicular (IV) officer,
Astronaut Joe Tanner, working from Houstonís Mission Control Center
instead of from onboard the spacecraft, as has been the case up to this
point.  Also, new procedures were used to expedite airlock
depressurization at the start of the spacewalk.

STS-110 will bring the S0 Truss to the station, the first segment of what
will be the stationís backbone.  Four spacewalks will be conducted during
that flight, all from the airlock and all using an oxygen/exercise
protocol to purge nitrogen from the spacewalkersí bloodstreams.  Walz and
Bursch used that protocol today.

During the spacewalk today, Walz and Bursch deployed two electrical
cables from their stowage area on the U.S. Laboratory Destiny and
connected them to a cable tray near the base of the Z1 Truss. Plans to
disconnect and restow the cables were put on hold while engineers
evaluated unexpected readings from current conversion units in the
circuit the cables completed.  Walz removed four thermal blankets from
the Z1 Truss and stowed them inside the truss, while Bursch retrieved
tools to be used on STS-110 spacewalks and brought them to the airlock. 
The two also secured looser-than-expected latches on two oxygen tanks and
two nitrogen tanks, on the airlock.

Walz and Bursch removed adaptors on which a Russian cargo crane had been
mounted and attached one of them to the Zarya moduleís exterior.  They
brought the other, U.S.-made, adaptor into the airlock. They also
inspected cable connectors outside the station and photographed the MISSE
(Materials International Space Station Experiment). Some of the materials
samples being exposed to the harsh conditions of space apparently were
peeling back off their mountings.

Scientists used the spacewalk to gather additional data for an experiment
looking at the effects of spacewalks and long-term exposure to
microgravity on lung function.  Also, Walz and Bursch will wear radiation
sensors for the EVARM experiment, a study of radiation doses experienced
by spacewalking astronauts.

Walz and Bursch each had made one previous spacewalk from the station
last month, and Walz also made a spacewalk on STS-51 in September 1993. 
During todayís spacewalk, Expedition 4 Commander Yury Onufrienko operated
cameras on the stationís Canadian provided robotic arm to document

A planned upgrade of the stationís software is scheduled for late this
week to prepare station computers for arrival of the S0 Truss and other
equipment to be delivered on subsequent flights.

Information on the crew's activities aboard the space station, future
launch dates, as well as station sighting opportunities from anywhere on
the Earth, is available on the internet at:


Details on station science operations can be found on an internet site
administered by the Payload Operations Center at NASA's Marshall Space
Flight Center in Huntsville, Ala., at:


The next ISS status report will be issued Feb. 22, or sooner, if
developments warrant.


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