HUBBLE SPACE TELESCOPE - Continuing to collect World Class
Science
DAILY REPORT #4854
PERIOD COVERED: 5am May 27 - 5am May 28, 2009 (DOY
147/0900z-148/0900z)
OBSERVATIONS SCHEDULED
ACS/WFC 11367
CCD Hot Pixel Annealing
Hot pixel annealing will be performed during SMOV4 before
the CCDs are
used for observations. The CCD TECswill be turned off and
heaters will
be activated to bring the detector temperatures to about
+20C. This
state will be held for approximately 12 hours, after which
the heaters
are turned off, the TECs turned on, and the CCDs returned
to normal
operating condition. To assess the effectiveness of the
annealing, a
bias and four dark images will be taken before and after
the annealing
procedure for both WFC and HRC. All the data for this
program are
acquired using internal targets. The initial annealing
occupied 5
visits. A copy of these visits to be run 4 to 5 weeks
later has been
added to support proposals 11465, 11510 and 11511. The
latter proposal
was too long.
S/C 11368
ACS CCD Temperature Set Point Determination
Purpose: Adjust the CCD temperature to nominal operating
level.
S/C 11358
WFC3 Science Data Buffer Check/Self-Tests for CS Buffer
RAM
The WFC3 Science Buffer RAM is checked for bit flips
during SAA
passages. This is followed by a Control Section (CS)
self-test
consisting of writing/reading a specified bit pattern from
each memory
location in Buffer RAM. The CS Buffer RAM self-test as
well as the bit
flip tests are all done with the CS in OPERATE.
FLIGHT OPERATIONS SUMMARY:
Significant Spacecraft Anomalies: (The following are
preliminary reports
of potential non-nominal performance that will be
investigated.)
HSTARS: (None)
COMPLETED OPS REQUEST:
18428-3 - SMOV4 - Configure tasking order to collect SI
memory dumps@ 147/1415z
and 147/1450z
18457-1 - Restore normal COS tasking orders @ 147/1550z
COMPLETED OPS NOTES: (None)
SCHEDULED
SUCCESSFUL
FGS
GSAcq
4
4
FGS
REAcq
0
0
OBAD with Maneuver
4
4
SIGNIFICANT EVENTS: (None)