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3 April 2003

HUBBLE SPACE TELESCOPE

DAILY REPORT       # 3333

PERIOD COVERED: DOY 92

Part 3 of 3

STIS 9615

Cycle 11 MAMA Dark Monitor

This test performs the routine monitoring of the MAMA detector dark
noise. This proposal will provide the primary means of checking on
health of the MAMA detectors systems through frequent monitoring of
the background count rate. The purpose is to look for evidence of
change in dark indicative of detector problem developing.

STIS 9629

MAMA Fold Distribution

The performance of MAMA microchannel plates can be monitored using a
MAMA fold analysis procedure. The fold analysis provides a
measurement of the distribution of charge cloud sizes incident upon
the anode giving some measure of changes in the pulse-height
distribution of the MCP and, therefore, MCP gain. This proposal
executes the same steps as the STIS MAMA Fold Analysis {8860} during
Cycle 9. 

ACS 9657

ACS Internal Flat Field Stability

The flat field stability and characterisation obtained during the
ground calibration and SMOV phases will be tested and verified
through a sub-sample of the filter set. Only internal exposures with
the calibration lamps will be required.

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. 

NICMOS 9702

NICMOS Parallel Thermal Background

NICMOS Camera 2 pure parallel exposures in the F222M and F237M
filters to establish the stability of the HST+NCS+Instrument thermal
emission. This data will be compared against the already available
Camera 3 measurements in F222M which show an increased thermal
background. 

STIS 9706

STIS Pure Parallel Imaging Program: Cycle 10

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

WFPC2 9710

POMS Test Proposal: WFII backup parallel archive proposal

This is a POMS test proposal designed to simulate scientific plans.

FLIGHT OPERATIONS SUMMARY:

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

HSTAR 8982:   GS Re-acquisition (1,2,2) starting {at} 087/05:07:36Z
              flagged by PTAS log file as not showing FLDV for FGS
              2.  FGS playback file confirmed FGS 2 saw SSLE during
              the initial attempt on FL walk-down.  Incident was
              during LOS. GS in FGS 2 appeared as an obvious double
              start during the initial (only) attempt, while the
              second attempt was successful. Under investigation.

COMPLETED OPS REQs: NONE

OPS NOTES EXECUTED: NONE

                 SCHEDULED     SUCCESSFUL    FAILURE TIMES
FGS GSacq           10             10
FGS REacq           06             06
FHST Update         18             18
LOSS of LOCK

SIGNIFICANT EVENTS:

Completed CCS 4.0.2 Command Timing Test 091/11:30Z - 18:40Z.  TDRSS
remains stable, minor fluctuation noticed during 4 kbps DE "noverify"
and "notlm" modes.  JSC1 (single state commanding) results are
consistent with previous testing, fluctuations in the EDRs continue
to appear.  Fluctuations are in the 12 - 20% range.  JSC2 (two-stage
commanding) remains nominal, no fluctuations noted.  A second day of
testing is planned, parameters UPLKVER and UPLKNVER will be changed
during JSC1 to try and bring the EDRs into a 10% range.  Data is
still being reviewed at the time.

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