STS-82 Day 6 Highlights
Back to STS-82 Flight Day 05 Highlights:
- On Sunday, February 16, 1997, 8:30 a.m. CST, STS-82 MCC Status Report # 11
- Mission managers decided this morning to add a fifth spacewalk to
Discovery's flight to refurbish the Hubble Space Telescope to allow
flight controllers and the astronauts time to repair tattered thermal
insulation on the12-ton observatory. The decision came after
astronauts Mark Lee and Steve Smith completed a 7 hour 11 minute
spacewalk to replace various components on the telescope.
- The revised plan calls for Greg Harbaugh and Joe Tanner to conduct the
fourth spacewalk of the flight tonight to replace a Solar Array Drive
Electronics package and to replace covers on Hubble's magnetometers
near the top of the telescope. They will also repair ripped thermal
insulation on the light shield of Hubble below the areas where the
magnetometers are located. On Monday night, Lee and Smith will venture
into Discovery's cargo bay again to repair additional thermal
insulation which has degraded on three key equipment bays near the
middle of the telescope.
- Hubble's redeployment will be shifted one day from Tuesday to
Wednesday with Discovery's landing at the Kennedy Space Center.still
planned for early Friday morning before dawn.
- The third spacewalk began at 8:53 p.m. Central time Saturday
evening. Lee and Smith removed and replaced a Data Interface Unit
which provides command and data interfaces between Hubble's data
management system and other subsystems. They also replaced an old
reel-to-reel style Engineering and Science Tape Recorder with a new
digital Solid State Recorder (SSR) that will allow simultaneous
recording and playback of data
- The final task for Lee and Smith was the changeout of one of four
Reaction Wheel Assembly units that use spin momentum to move the
telescope toward a target and maintain it in a stable position. All of
the new components are reported to be in excellent condition.
- Discovery's small maneuvering jets were then fired for about 20
minutes to gently raise Hubble's altitude. The reboost maneuver by
Commander Ken Bowersox and Pilot Scott Horowitz was the third in the
past two days. Lee and Smith returned to Discovery's airlock at 4:04
A.M., with 21 hours 20 minutes of spacewalk servicing time having been
logged during the first three excursions in the Shuttle's cargo bay.
- The astronauts will begin an eight hour sleep period at 9:25 a.m. this
morning and will receive a wake up call at 5:25 p.m. to begin the
seventh day of the mission.
- Discovery and the Hubble Space Telescope continue to orbit the Earth
every 90 minutes at an altitude of 374 statute miles with all of the
Shuttle's systems still operating in flawless condition.
- On Sunday, February 16, 1997, 5:00 p.m. CST, STS-82 MCC Status Report # 12
- The STS-82 astronauts will be adding some insulation repair work to
their plans for tonight and tomorrow following a decision earlier
today to conduct a fifth spacewalk during the Hubble Space Telescope
- Since HST has been in the Discovery's payload bay, several
separations in the external insulation on the observatory have been
noted. HST managers are concerned that the separated areas could trap
light and cause localized heating, damaging Hubble's sensitive
systems. Consequently, mission managers decided to add a fifth
spacewalk Monday night to give astronauts time to repair the
- Before the repair work begins tonight, astronauts Greg Harbaugh and
Joe Tanner will complete the scheduled work on the telescope.
Harbaugh and Tanner will first replace a Solar Array Drive Electronics
package. Then the HST flight control team will command the telescope
to redeploy the booms carrying its high gain antennas. The telescope
will then be turned and tilted slightly to give the spacewalkers
access to the top portions of the telescope where Harbaugh and Tanner
will replace covers over several magnetometers. While at the top of
the telescope, they also will place patches made of insulation
material over the tears in the telescope's light shield. The entire
spacewalk is expected to take about six hours and will begin between 9
and 10 p.m. Central time tonight.
- On Monday night, astronauts Mark Lee and Steve Smith will go into
Discovery's payload bay again to repair thermal insulation which has
degraded on three key equipment bays near the middle of the telescope.
- Because of the additional spacewalk, the final firing of the
steering jets to raise Hubble's altitude has been moved from the end
of tonight's EVA to the end of tomorrow's EVA, and Hubble's
redeployment has been shifted one day from Tuesday to
Wednesday. Discovery's landing at the Kennedy Space Center.still
remains on track for early Friday morning.
Go to STS-82 Flight Day 7 Highlights: