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| Related
material for Flight Day 7 -
New Camera (ACS)
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Goddard Space Flight Center
The Hubble Space Telescope Project
Hubble Status Report
 Wed
| Mar. 7, 2002 - 5:30 pm EST
The Advanced Camera for Surveys (ACS), the brand-new science
instrument installed during EVA4, has now fully passed its
Aliveness and Functional Tests.
Both the Wide-Field Camera (WFC) and the High Resolution Camera
(HRC) have been shown to have excellent (very low) read noise,
very well-performing amplifiers, and properly functioning
shutters, filter wheels, and calibration doors. The Thermal
Electric Coolers (TEC's) easily cooled the detectors to -67C,
using only a fraction of their available power. Cooling to
operational levels of -74 to -80 C will be easily accomplished
after deploy.
Four EVA's down, one more to go - this time for the Nicmos
Cooling System and its associated radiators and Capillary
Pump Loops, starting early tomorrow (Friday) morning.
Johnson
Space Center
Space News :: Latest Items
 Thur
| Mar. 7, 2002 - 11:46 am EST
Astronauts Jim Newman and Mike Massimino concluded a seven
hour 30 minute spacewalk at 10:30 a.m. central time.
During the spacewalk, Newman and Massimino removed the last
of Hubble's original instruments, the Faint Object Camera,
replacing it with the Advanced Camera for Surveys. The Faint
Object Camera is secure in Columbia's payload bay for a return
trip to Earth.
Todays spacewalk was the fourth of the mission. The fifth
and final scheduled spacewalk is slated to begin at 1:52 a.m.
central time Friday.
Thur
| Mar. 7, 2002 - 10:45 am EST
With the ACS securely in place the crewmembers continued working
to install the Electronic Support Module (ESM) and the Cross
Aft Shroud Harnness (CASH). The ESM contains elecronics to
support the Nicmos Cryo Cooler (NCC) and the CASH connects
the two.
The ESM passed its aliveness test. Installation of the NCC
will take place during tomorrow's EVA.
 Thur
| Mar. 7, 2002 - 7:03 am EST
Columbia astronauts successfully installed the Advanced Camera
for Surveys in the Hubble Space Telescope early Thursday.
Spacewalkers Jim Newman and Mike Massimino slid the new, powerful
instrument into the slot from which they had removed the Faint
Object Camera earlier. ACS now awaits its alivesness test
to see if its systems function properly.
The Faint Object Camera is the last instrument launched aboard
the orbiting observatory to be replaced.
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Thur
| Mar. 7, 2002 - 6:13 am EST
The Faint Object Camera (FOC) was successfully removed about
half an hour ago and now the ACS is being brought to the axial
bay.
Thur
| Mar. 7, 2002 - 5:02 am EST
Mike Massimino stepped inside Hubble after working open the
latches to Hubble's axial bay on the starboard side. The axial
bay houses the Faint Object Camera (FOC) which will be replaced
by the Advanced Camera for Surveys (ACS).
 Thur
| Mar. 7, 2002 - 4:27 am EST
Columbia Astronauts Jim Newman and Mike Massimino began the
fourth spacewalk of the STS-109 mission at 3 a.m. CST. They
will install the new Advanced Camera for Surveys in the Hubble
Space Telescope.
The new instrument replaces the Faint Object Camera, the last
of Hubble's original instruments.
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