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STS-110 STATUS REPORTS #12 & 13



Submitted by Arthur - N1ORC


NASA HSF News Digest      Sunday, April 14 2002      Volume 01 : Number
037

In this issue:

        STS-110 Mission Status Report #12
        STS-110 Mission Status Report #13

All NASA HSF News Releases and Mission Status Reports are available
online at
<http://spaceflight.nasa.gov/spacenews/>.

----------------------------------------------------------------------

Date: Sun, 14 Apr 2002 05:15:26 -0500 (CDT)
From: info@jsc.nasa.gov
Subject: STS-110 Mission Status Report #12

STS-110
Report # 12 
Sunday, April 14, 2002 – 5 a.m. CDT 


Outfitting of the newest component of the International Space Station
continues today with the mission’s third spacewalk. Shuttle astronauts
Steve Smith and Rex Walheim will continue installation work on the S-Zero
(S0) Truss, now permanently attached to the station’s U.S. laboratory
Destiny.

They are scheduled to step out of the station’s Quest airlock at 9:34
a.m.  Their first task is to release a claw atop the lab that temporarily
secured the truss to it during the initial installation. Walheim, wearing
a solid white spacesuit, will release the latch as Smith, wearing a
spacesuit with red stripes, begins making connections to route power,
data, and video through the truss for later operation of the space
station robotic arm, Canadarm2. During the 6½-hour spacewalk, Smith will
be working from a platform on the station arm, operated by Mission
Specialist Ellen Ochoa and Flight Engineer Dan Bursch.

Walheim will install circuit breakers in the truss, a task left over from
the first spacewalk, which lasted 7½ hours. Together they will then turn
their attention to the Mobile Transporter, spending about 45 minutes
releasing its many launch restraints and removing a small thermal cover
from a radiator on the railcar. Then they return to work on the
electrical connections for about another hour and a half.

After transferring tools and testing sensors on the side of S0, the last
task will be to install the Airlock Spur. The 14-foot beam, fitted with
handrails, will stretch from Quest to the forward side of S0, helping
future spacewalkers work more efficiently.

Inside the shuttle/station complex, Mission Specialists Lee Morin and
Jerry Ross will coach the spacewalkers through the outlined tasks.
Shuttle Commander Mike Bloomfield and Pilot Steve Frick will provide
photographic and video support during the spacewalk, using Atlantis’
robotic arm.

Atlantis’ crew was awakened about 3:52 a.m. by the song “All Star,”
performed by Smash Mouth from the Shrek movie soundtrack.  The song was
played for Walheim by his family.

Onboard the space station, Expedition Four Commander Yury Onufrienko,
Flight Engineer Carl Walz and Bursch were awakened at 3:44 a.m. Both
crews are scheduled to begin their sleep period at 7:44 p.m. 

The next STS-110 mission status report will be issued this evening, or
earlier if events warrant.  




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------------------------------

Date: Sun, 14 Apr 2002 16:42:40 -0500 (CDT)
From: info@jsc.nasa.gov
Subject: STS-110 Mission Status Report #13

STS-110
Report # 13 
Sunday, April 14, 2002 - 5:30 p.m. CDT 

Two astronauts rewired the robotic arm on the International Space Station
today and released locking bolts on the first space railcar during a 6
hour, 27 minute spacewalk, the third of Atlantis’ assembly flight to the
international complex.

The stage is now set for the inaugural run Monday of the so-called Mobile
Transporter, a flatcar designed to transport the space station’s robotic
arm up and down an integrated truss system that will span the length of a
football field.

Within minutes after starting their spacewalk at 8:48 a.m. Central time,
Steve Smith and Rex Walheim released a claw-like device on the top of the
Destiny Laboratory to which the new 13 ½ ton S-Zero (S0) truss was
initially attached on Thursday. With the truss’ four large struts now
securely bolted to Destiny, the claw was no longer needed.

Smith and Walheim then reconfigured a number of connectors providing
electricity to the 58-foot-long Canadarm2 robotic arm on the station so
it can be powered from the S-Zero truss rather than Destiny. The arm has
two sets, or “strings” of avionics equipment for its operation. As Smith
and Walheim worked deliberately, one set of avionics was rewired and
tested, followed by a separate set of redundant avionics.

Smith spent most of the day riding at the end of the shuttle’s robotic
arm, which was operated by Pilot Steve Frick during the rewiring of its
companion station arm. Walheim was the so-called “free-floating”
astronaut, tethered to the station to assist Smith. It was the seventh
spacewalk of Smith’s career. He is the second most experienced U.S.
spacewalker behind crewmate Jerry Ross, who helped choreograph today’s
excursion from inside Atlantis with the help of Lee Morin. It was
Walheim’s second spacewalk. 

With Canadarm2 successfully rewired and both of its electrical, data and
video circuit sets checked out, Smith and Walheim pressed ahead to
release clamps which secured the Mobile Transporter to the S-Zero truss
during its launch last week. The railcar, which weighs about 1900 pounds,
will be commanded Monday by ground controllers to move about 32 feet up
and down the truss at a glacial speed of a little less than one inch per
second in the first test of its computers, drive motors, suspension unit,
video and data umbilicals and the first section of rails on the S-Zero.

The railcar, and an associated Mobile Base System device to be installed
on the transporter in early June on the next shuttle assembly flight to
the ISS, will ultimately enable the robotic arm to travel to various
worksites on the expanding trusses of the station for future
construction. The Mobile Base System will be the platform upon which the
Canadarm2 will attach itself to be driven up and down the length of the
ISS.

The only task not completed today was the attachment of a 14-foot ladder
called the Airlock Spur from the S-Zero truss to the Quest Airlock
designed to simplify the path for future spacewalkers moving back and
forth from the truss to the airlock itself. 

As the spacewalk neared its completion, final diagnostic tests of the
newly wired station arm were taking longer than planned, and because the
Canadarm2 is required for the airlock ladder to be pivoted away from the
truss to Quest, flight controllers decided to defer its installation
until the final spacewalk on Tuesday.

Smith and Walheim finally returned to Quest and completed their spacewalk
at 3:15 p.m. Central time with the repressurization of the airlock.

Atlantis astronaut Ellen Ochoa and ISS Expedition Four crew member Dan
Bursch backed up Frick in the operation of the shuttle’s robot arm during
today’s spacewalk, the 37th devoted to space station assembly. Commander
Mike Bloomfield documented the spacewalk from Atlantis’ aft flight deck
while Expedition Four Commander Yury Onufrienko and Flight Engineer Carl
Walz continued to transfer supplies from the shuttle to the station for
future use.

Late today, Frick conducted an hour-long reboost of the ISS, using
Atlantis’ steering jets to move the station higher by about two statute
miles. It was the second of three planned maneuvers to raise the
station’s altitude and the second in as many days.

The ten crew members are scheduled to begin an eight-hour sleep period at
7:44 p.m. Central time tonight and will be awakened just before 4 a.m. to
prepare for the testing of the new Mobile Transporter.

The JSC newsroom is closed and will reopen Monday at 5 a.m.

The next STS-110 mission status report will be issued Monday morning
after crew wake up, or earlier, if events warrant.  

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