STS-100 Day 8 Highlights
Back to STS-100 Flight Day 07 Highlights:
- On Thursday, April 26, 2001, 5:30 a.m. CDT, STS-100 MCC Status Report # 14
- Good news greeted space station flight controllers this morning
when, shortly after awakening, Expedition Two flight engineer Susan
Helms reported that the International Space Station computer systems
may be returning to normal. Working at a laptop computer aboard the
station that serves as the crew's primary interface with the station's
United States command and control computer system, Helms reported the
good news at about 3:45 a.m. Shortly afterward, Helms performed a
series of troubleshooting steps that restored the ground's ability to
monitor and send commands to the station's U.S. systems.
- Space station flight controllers then sent commands that have put
the station's systems in a better configuration in the event computer
problems recur today. They also are planning to send commands that
will transmit data to the ground from the station computers to allow
technicians to thoroughly analyze those computers' hardware and
software as part of the investigation that is under way to determine
the cause of the computer problems.
- Today's plan for the astronauts and cosmonauts aboard Endeavour and
the station will have them continue joint work this morning to reload
the Raffaello logistics module with unneeded station equipment and
supplies for return to Earth. The crews have almost completed
unloading the 4,000 pounds of equipment that Raffaello carried to the
station. While that reloading work takes place, flight controllers
will continue their analysis of the station computers.
- Given continued success with the computer troubleshooting, the crews
will resume work with the station's new Canadarm2 and the shuttle's
robotic arm after 8 a.m., handing off a 3,000-pound Spacelab Pallet
from the station arm to the shuttle arm to store the pallet back in
Endeavour's payload bay. Another reboost of the spacecraft's altitude
is planned later today as well, an hour-long jet firing by Endeavour
that will raise the complex's altitude by almost 4= miles.
- A practice run with the new station arm to rehearse moves the arm
must make during the next shuttle assembly mission to the station to
attach a new airlock will be conducted on Friday.
- The crew of Endeavour was awakened just after 2:40 a.m. by a Russian
folk song, "Behind the Fog." That song was played for Endeavour
crewmember Russian cosmonaut Yuri Lonchakov. The two spacecraft are
orbiting the Earth every 92 minutes at an altitude of 243 statute
miles. The next status report will be issued this evening at the end
of the crews' day or as events warrant.
- On Thursday, April 26, 2001, 10:30 a.m. CDT, STS-100 MCC Status Report # 15
- Today, the astronauts and cosmonauts aboard Endeavour will continue
joint work to reload the Raffaello Logistics Module with unneeded
station equipment and supplies for return to Earth. The crews have
completed unloading the 4,000 pounds of equipment that Raffaello
carried to the station. While the reloading of Raffaello takes place,
flight controllers will continue their analysis of the station
computers. The station command and control computer brought on line
early this morning has continued to be fully functional and operate
normally throughout the day. Controllers are working to bring another
such computer online as a backup system later today. The recovery of
the one command and control computer during the night is believed to
have resulted from an automatic sequence aboard the station that
powered each of the three command and control computers on and off in
an attempt to bring them on line. The other two computers remained off
- Given continued success with the computer recovery, the shuttle and
station crews will resume work with the station's new Canadarm2 and
the shuttle's robotic arm on Friday, handing off a 3,000-pound
Spacelab Pallet from the station arm to the shuttle arm to store the
pallet back in Endeavour's payload bay. A practice run with the new
station arm to rehearse moves the arm must make during the next
shuttle assembly mission to the station to attach a new airlock also
will be conducted on Friday.
- A second reboost of the station's altitude remains planned for later
today. It will be an hour-long jet firing by Endeavour that will raise
the complex's altitude by almost 4= miles. The two spacecraft are now
orbiting the Earth every 92 minutes at an altitude of 243 statute
- On Thursday, April 26, 2001, 8:30 p.m. CDT, STS-100 MCC Status Report # 16
- As flight controllers continued to troubleshoot computer systems on
board the International Space Station (ISS), the ten crewmembers were
told late today they would spend some bonus time together, after
mission managers requested an additional two days of docked operations
to allow ground teams to recover the use of command computers in the
Destiny laboratory and to complete joint activities.
- Final confirmation of the two-day extension is pending Russian
concurrence of NASA's request for a one-day delay to their Soyuz
launch, currently scheduled for Saturday. That would allow Endeavour
to remain docked to the Station until at least Monday to help resolve
the computer problems which were first noticed Tuesday night. The
Soyuz vehicle was rolled out to its launch pad at the Baikonur
Cosmodrome in Kazakhstan at dawn today.
- With one of three command and control computers still up and running
on board the station, flight controllers worked through the day to
overcome what is believed to be a software problem with the other two
command computers and their processing systems. Ultimately a decision
was made to postpone the unberthing of the Raffaello logistics module
from the Unity module until Friday while ground controllers worked to
recover the computers. With other work on hold, the crewmembers
completed packing up Raffaello with unneeded gear and trash, which
will be brought back to Earth.
- If at least one additional command computer can be recovered
overnight, and engineers can reboot two fault protection computers in
the Unity module which also shut down earlier today, the Raffaello
module could be unberthed around midday Friday. Procedures to bring at
least one additional computer back on line for further operations are
expected to take about 10 hours.
- If Raffaello can be returned to Endeavour's cargo bay tomorrow, then
the crew will likely be given the green light to press ahead with the
handoff of a pallet from the newly installed Canadarm2 Station robot
arm to Endeavour's slightly smaller robot arm on Saturday, setting the
stage for undocking on Monday.
- To recover the two Unity computers, which offer a defense against
other computer malfunctions by automatically rebooting them,
controllers will have to perform a complex resynchronization procedure
early Friday shortly before the planned wakeup of the two crews.
- Endeavour has enough power and other consumables to remain in orbit
until Friday, if necessary. With a two-day mission extension, landing
would occur on Wednesday.
- The crews of Endeavour and the International Space Station are
scheduled to be awakened around 2:40 a.m. Central time
Friday. Meanwhile, all of Endeavour's systems continue to function
flawlessly as it orbits the Earth linked to the ISS.
Go to STS-100 Flight Day 9 Highlights: