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NASA HSF News Digest V1 #1



SUBMITTED BY ARTHUR Z. ROWE - N1ORC
2002 International Space Station Status Report #4

Date: Fri, 18 Jan 2002 17:03:27 -0600 (CST)
From: info@jsc.nasa.gov
 
 The Expedition Four crew of the International Space Station wrapped up a
busy week Friday, installing a new, more robust computer storage device
and preparing for the second spacewalk of its duty tour a little more
than a week after the first.

Flight Engineer Carl Walz worked with computer experts on the ground to
install and activate a new solid state mass memory unit for one of the
station’s three main command and control computers, known by its acronym
of  “C&C1.”  It took Walz about two hours to remove the older mass memory
unit, which used a spinning disk design, and another two hours for flight
controllers on the ground to complete the reactivation of C&C1. Computer
experts on the ground are continuing to evaluate data on the health of
the computer, but expect to place it in the backup spot to the primary
computer, C&C2, on Jan. 23. C&C2 had its mass memory unit upgraded
earlier this month.  The final new mass memory unit is to be installed in
C&C3 on Feb. 1.  In addition, flight controllers this week also installed
new software in two guidance, navigation and control computers on the
station.

Meanwhile, Commander Yury Onufrienko and Flight Engineer Dan Bursch
continued preparations for the next spacewalk, scheduled for Jan. 25.
This week, they replenished space suit consumables used by Onufrienko and
Walz on Monday, dried out the suits and readied the hardware items they
will install on the outer skin of the station. The spacewalk is expected
to begin at 9:35 a.m. CST next Friday, and last about 5 1/2 hours. 
Onufrienko and Bursch will wear Russian Orlan spacesuits and exit the
station through the Pirs module, which serves as a docking module and
airlock. Walz will provide support inside, monitoring their progress and
moving the robotic Canadarm 2 for television coverage of their
activities. It will be the 33rd spacewalk in support of space station
assembly, and the eighth conducted from the station itself.

The two space-age construction workers will install 11 different systems
on the outside of the Zvezda Service Module, including six thruster plume
deflectors, the second of four ham radio antennae, a replacement
experiment for studying contaminating particles from control jets, and a
physics experiment. The Efflux Protection Assembly deflectors are
designed to redirect plumes from the jets that help control the station’s
orientation so that they do not leave potentially harmful residues on the
outside of the station where spacewalkers must work. The suitcase-like
Kromka 1 experiment will replace the existing Kromka 1-0 experiment
package, placing new materials samples where they can collect
contaminants from the thrusters for future analysis (the Kromka 1-0
samples will be bagged and returned to the station for delivery to Earth
aboard a Soyuz return craft). The Platan-M package is a physics
experiment designed to search for natural low-energy heavy nuclei of
solar and galac!
tic origin.

The amateur radio antenna is one of four that eventually will allow space
station crew members to make “ham” radio contacts from the comfort of
their living quarters inside Zvezda.

While crew members concentrated on construction and maintenance tasks,
inside the Destiny Laboratory, a host of scientific experiments continued
to collect information about the effects of long-term space flight on
humans, biotechnology, medicine, agriculture, electronics and
pharmaceutical compounds.

For the latest information on the crew's activities aboard the space
station, future launch dates and times, as well as station sighting
opportunities from anywhere on the Earth, please visit the Web at:
http://spaceflight.nasa.gov. Details on station science operations can be
found on the Web site of the Payload Operations Center at NASA's Marshall
Space Flight Center in Huntsville, Ala. at:
http://www.scipoc.msfc.nasa.gov.
 
The next ISS status report will be issued Jan. 25, following the
spacewalk.

- -END-





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