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06 May 2003

HUBBLE SPACE TELESCOPE

DAILY REPORT # 3356

PERIOD COVERED: DOY 125

Part 4 of 4

NICMOS 9640

Flats Stability

This calibration proposal is the Cycle 11 NICMOS monthly monitor A
series of camera 1, 2, & 3 flat fields will be obtained to monitor
the health of the cameras.

ACS 9649

ACS internal CTE monitor

The charge transfer efficiency {CTE} of the ACS CCD detectors will
decline as damage due to on-orbit radiation exposure accumulates.
This degradation will be closely monitored at regular intervals,
because it is likely to determine the useful lifetime of the CCDs.
All the data for this program is acquired using internal targets
{lamps} only, so all of the exposures should be taken during Earth
occultation time {but not during SAA passages}. This program emulates
the ACS pre-flight ground calibration and post-launch SMOV testing
{program 8948}, so that results from each epoch can be directly
compared. Extended Pixel Edge Response {EPER} and First Pixel
Response {FPR} data will be obtained over a range of signal levels
for both the Wide Field Channel {WFC}, and the High Resolution
Channel {HRC}. 

ACS 9674

CCD Daily Monitor

This program consists of basic tests to monitor, the read noise, the 
development of hot pixels and test for any source of noise in ACS CCD
detectors. This programme will be executed once a day for the entire
lifetime of ACS. 

STIS 9708

STIS Pure Parallel Imaging Program: Cycle 11

This is the default archival pure parallel program for STIS during
cycle 11.

WFPC2 9709

POMS Test Proposal: WFII parallel archive proposal

This is the generic target version of the WFPC2 Archival Pure
Parallel program. The program will be used to take parallel images of
random areas of the sky, following the recommendations of the 2002
Parallels Working Group. 

FLIGHT OPERATIONS SUMMARY:

Significant Spacecraft Anomalies: (The following are preliminary
reports of potential non-nominal performance that will be
investigated.) 

HSTAR 9022: GS Acquisition (1,3,1) {at} 126/00:33:36Z failed to Gyro
            control due to SRLE on FGS 1.  FHST FM Update {at}
            126/00:28:06Z showed attitude errors of -146.376,
            16L272, -7.131, second FM Update showed errors of 3.658,
            4.930, -0.061. The guide star acquisition for this
            observation was non-nominal, further analysis will
            determine if a repeat observation is required.

COMPLETED OPS REQs:
16975-0  CCC K51 to Level 5 {at} 126/21:03z

OPS NOTES EXECUTED:
1105-0  Limit Adjustment for CCC K51 to Level 5 Change

                    SCHEDULED     SUCCESSFUL    FAILURE TIMES
FGS GSacq              09             08       See HSTAR # 9022
FGS REacq              08             08
FHST Update            22             22
LOSS of LOCK

SIGNIFICANT EVENTS:
In response to Battery 4 and 5 warm-up and in preparation for Battery
2 Capacity test on 5/7/03, successfully lowered the CCC 5 K1 from
Level 4 to Level 5 {at} 125/21:03Z (OR 16975).  Battery 5 CCC K1 relay
operated as expected in the subsequent orbit day.  EPS SEs will
continue to monitor and trend battery temperatures.

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