NASA Hubble Space Telescope Daily Report #4854

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)