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26 Mar 2003

HUBBLE SPACE TELESCOPE

DAILY REPORT        # 3327

PERIOD COVERED: DOY 84

Part 3 of 3

STIS 9608

CCD Bias Monitor - Part 2

Monitor the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at
gain=1, and 1x1 at gain = 4, to build up high-S/N superbiases and
track the evolution of hot columns.

ACS 9673

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

WFPC2 9676

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.

STIS 9706

STIS Pure Parallel Imaging Program: Cycle 10

This is the default archival pure parallel program for STIS during
cycle 10.

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

HSTAR 8974:  GSacq(3,2,3) results to Finelock Backup (3,0,3) at AOS.
The GSACQ(3,2,3) of 084/17:05:31 - 17:12:58 which begun during ZOE
resulted to fine lock backup (3,0,3), at AOS 084/17:27:36 using
FGS#3. There were no indication flag(s) at AOS. Unable to determine
FGS Modes and Flag Bit Changes, pending ETR Dump at 084/23:10:30.
Possible observations affected:

        WFPCII 50,51 STIS 50, ACS 69. The guide star acquisition for
        this observation was non-nominal, further analysis will
        determine if a repeat observation is required.

HSTAR 8975: ReAcq(3,2,3) Requires 2 attempts to gain FL on FGS2. OTA
SE, investigating PTAS log files, uncovers ReAcq that required 2
attempts to achieve FL Data Valid on FGS2. The preceding GSAcq {at}
081/18:29:32 succeeded on first attempt.

        Under investigation.

OPS NOTES EXECUTED: 1091-1 - Adjust ACS Error Count Limit {at} 084/2233z

                          SCHEDULED     SUCCESSFUL    FAILURE TIMES
FGS GSacq              10                        10
FGS REacq               5                          5
FHST Update            19                        19
LOSS of LOCK


SIGNIFICANT EVENTS: None

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