Spacewalkers Outfit Station’s Exterior
(NASA) The two
International Space Station crewmembers successfully wrapped up
their mission’s first spacewalk Wednesday morning after setting
up experiments and inspecting vent openings.
10 Commander Leroy Chiao works outside the Zvezda Service
Module during his mission’s first spacewalk.
by NASA TV
Leroy Chiao and Flight Engineer Salizhan Sharipov installed a
work platform, mounted a robotics experiment, checked the vents
on systems that help control the Station’s atmosphere and installed
a scientific experiment during the 5-hour, 28-minute spacewalk
that began at 2:43 a.m. EST.
their work and re-entered the Pirs docking compartment, closing
its hatch at 8:11 a.m. EST. Most of the work was done outside
the Zvezda Service Module. Sharipov and Chiao wore Russian Orlan
spacesuits. This was Chiao’s fifth spacewalk and Sharipov’s first.
the hatch and assembling equipment, Sharipov and Chiao moved from
Pirs back to about the middle of the Zvezda. There they installed
a Universal Work Platform — a kind of space work table — and
its base, along with associated wiring.
installed on the work platform the European commercial experiment
Rokviss (Robotic Components Verification on ISS). That experiment
explores the use of manipulator rotary joints, operated from inside
Zvezda via a receiver-transmitter or from the ground.
designed to study remote operation of such joints and the effects
of space on them. The German device could help lead to a new generation
of space robots.
Chiao worked together to move the Japanese MPAC&SEED (Microparticle
and Capture & Space Environment Exposure Device) experiment
to a new location on its rail-like mounting. That experiment exposes
various materials to space. At the old MPAC&SEED location
they mounted a Rokviss antenna, then ran and connected cables
to link a transceiver with the experiment and the antenna.
Zvezda, they inspected and photographed gas vent nozzle extenders
including those of the Elektron and Vozdukh. Both the Elektron,
which divides water into its components, oxygen for the Station’s
interior and hydrogen, which is vented overboard, and Vozdukh,
a carbon-dioxide scrubber, have experienced some glitches recently.
The inspection was designed to help determine if the vents could
be part of the problem.
reported they saw a black residue around the vent’s base and a
white, honeycomb-like or oily residue on some of the vents themselves.
task was finished, Sharipov and Chiao moved with their tool carrier
back to Pirs.
scheduled task was to install the Russian Biorisk experiment on
the outside of the Docking Compartment. It looks at the impact
of spaceflight on microorganisms. Eventually information from
the experiment could be used to keep us from contaminating other
planets with Earth’s microorganisms, or perhaps even to protect
our own planet.
indicated a problem with the power supply to the Rokviss antenna
installed early in the spacewalk. Sharipov and Chiao returned
to the antenna site to remate connectors of cabling they had installed.
Telemetry showed that had solved the problem.
was not available during some of the spacewalk. Because of the
orientation of the Station and the angle of the sun, the Ku band
antenna that sends down television got colder than its low temperature
limit. As a result, flight controllers repeatedly "parked"
the antenna. Station video cameras recorded the spacewalk for
This was the
57th spacewalk to assemble and maintain the Station. It was the
32nd spacewalk from the Station itself, and the 14th from Pirs.
A second spacewalk
for Chiao and Sharipov is scheduled for March. During that spacewalk,
they will install navigational and communications equipment for
the arrival of the first Automated Transfer Vehicle cargo craft.
The ATV is
an unpiloted cargo carrier similar in some ways to the Russian
Progress spacecraft, but it has more than double the cargo capacity
of the Progress. It is scheduled to make its first flight late