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International Space Station Status Report #03-3

Submitted by Arthur - N1ORC

International Space Station Status Report #03-3 
2 p.m. CST, Wednesday, January 15, 2003 
Expedition Six Crew

Expedition 6 Commander Ken Bowersox and NASA Science Officer Don Pettit
continued the assembly of the International Space Station today and set
the stage for a series of complex shuttle construction flights to the
complex later this year during a 6-hour, 51-minute spacewalk staged out
of the Quest Airlock. 

The spacewalk, which was the first for both Bowersox and Pettit, was the
50th excursion in support of the assembly and maintenance of the ISS, the
25th originated from the Station itself and the 16th conducted from
Quest. Russian cosmonaut Nikolai Budarin supported the spacewalk from
inside the ISS, acting as the spacewalk choreographer while operating
television cameras on the Canadarm2 robotic arm. 

After encountering some difficulty opening the airlock hatch due to a
strap on the inside of the thermal hatch cover, the hatch finally swung
open and Bowersox and Pettit began their spacewalk at 6:50 a.m. Central
time by placing their suits on internal battery power. As he did,
Bowersox reported a loss of digital data for his suit systems, requiring
him to recycle his suit power that cleared up the momentary glitch. Once
outside, Bowersox and Pettit quickly set up tools and gear, then moved to
the recently installed Port One (P1) Truss segment, where they released
ten remaining launch restraints from the trussí radiator system. Eight
others had been released when the truss was delivered to the ISS last
November on the STS-113 mission. 

Flight controllers then sent commands to unfurl the P1ís center radiator,
enabling it to extend to its fully deployed length of 75 feet, preparing
the system for its activation later this year to provide cooling for
station systems. The deployment took only 9 minutes to complete. 

After inspecting some hardware on the P1 Truss for engineers on the
ground, the two spacewalkers made their way to the Unity connecting node,
where Pettit used Kapton tape to dab away small amounts of grit from a
sealing ring on the nadir Common Berthing Mechanism, leaving the CBM in a
pristine condition for the attachment of the Raffaello Multi-Purpose
Logistics Module during the next shuttle flight to the station in March. 

Bowersox and Pettit were unable to complete one minor task, the
installation of a stanchion and a light fixture on one of two handcarts
located on the Starboard One (S1) Truss which future spacewalkers will
use to transport themselves up and down the stationís truss system. The
stanchion would not release from its stowed position on the truss,
apparently because of a pin interfering with its movement, and the task,
considered a low priority for todayís spacewalk, was deferred to a future
Expedition excursion. 

As they neared the end of their spacewalk, Bowersox and Pettit returned
to the center of the station, as Pettit retrieved tools from a storage
box on the Z1 Truss and conducted a health check on an ammonia reservoir
that was delivered to the P6 solar array truss structure in 2001. That
ammonia system will be used to partially fill the cooling loops of the P1
Truss on an intricate shuttle assembly flight later this year that will
occur in the midst of the reconfiguration of station power systems. 

As they reentered the Quest Airlock, Bowersox and Pettit used a scissors
to cut away the strap on the hatch cover which interfered with the
rotation of the hatch handle at the start of the spacewalk. The hatch
closed normally with no further problems expected in the future. 

With their work completed, Bowersox and Pettit completed their spacewalk
at 1:41p.m. Central time, raising the total spacewalk time for ISS
assembly and maintenance to 312 hours and 11 minutes. 

Before the spacewalk began, robotic engineers in Mission Control sent
commands to move the stationís Mobile Transporter from the far end of the
P1 Truss to its normal parking place at the centermost S0 Truss segment
to protect its umbilical cable from any potential damage from orbital
debris. The Transporter began its move from the P1 Truss to the S0 Truss
at 1:53 a.m. Central time, latching itself in place about 20 minutes

The transporter is used to maneuver the Canadarm2 space crane up and down
the length of the stationís trusses for assembly work. It had been parked
on the P1 Truss during the STS-113 mission when it ran into a
communication antenna on the truss, delaying its use for one of that
flightís spacewalks. Today, it moved back to its normal parking place

Bowersox, Budarin and Pettit will enjoy an off-duty day Thursday in the
wake of todayís spacewalk before resuming their normal complement of
scientific experiments and ISS housekeeping on Friday. 

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 station status reports will be included as part of the STS-107
Shuttle mission status reports, unless other developments warrant. 


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