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)