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ISS STATUS REPORT #25



Submitted by Arthur - N1ORC

4 p.m. CDT, Friday, May 24, 2002 
Expedition 4 Crew 

The Expedition 4 crew of the International Space Station spent much of
this week preparing for the arrival of Endeavour on STS-111 and their
return home. They packed equipment and supplies for return to Earth
aboard Endeavour. They also reconfigured and checked out spacesuits and
the stationís joint airlock in preparation for three spacewalks at the
station by Endeavour mission specialists Franklin Chang-Diaz and Philippe
Perrin.

Expedition 4 Commander Yury Onufrienko and astronauts Carl Walz and Dan
Bursch were launched last Dec. 5 aboard Endeavourís STS-108 mission, and
have been on the ISS since Dec. 7.

Endeavour is scheduled for launch on May 30. That would result in a
docking with the station on June 1.  Endeavour Commander Ken Cockrell,
Pilot Paul Lockhart, and mission specialists Chang-Diaz and Perrin are
bringing the Expedition 5 crew to the station. That crew is commanded by
Valery Korzun and includes astronaut Peggy Whitson and cosmonaut Sergei
Treschev. 

The first two of the three spacewalks by Chang-Diaz and Perrin will focus
on installation of a new Mobile Base System for the stationís robotic
arm, Canadarm2. It will allow the arm to move along the railroad-like
tracks of stationís main truss, eventually to reach a length of more than
350 feet. The third spacewalk is to change out the wrist roll joint of
Canadarm2.

On Friday, Dan Bursch worked with the Biomass Production System, a plant
growth experiment using wheat and a plant related to cabbage and
radishes. Each crewmember was scheduled for an hour to pack personal
possessions, as they have been for much of this week. On Thursday Walz
and Bursch completed their final session with the PuFF (pulmonary
function in flight) experiment, which looks at effects of microgravity on
lung function.

Several experiments have been deactivated, including the Physics of
Colloids in Space, which was shut down Tuesday and which will be returned
to Earth on Endeavour. It is a study of fine particles suspended in a
fluid. An example of such fluids is paint.

Major systems aboard the station continue to function well as the ISS
orbits at an average altitude of about 243 statute miles. Upcoming ISS
status reports will be incorporated into Mission Control status reports
during STS-111.

Information on the crewís 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:

http://spaceflight.nasa.gov

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:

http://www.scipoc.msfc.nasa.gov

The next ISS status report will be issued on Friday, May 24, or earlier
if developments warrant.

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