HUBBLE SPACE TELESCOPE

       DAILY REPORT #3084

PERIOD COVERED:  0000Z (UTC) 03/29/02 - 0000Z (UTC) 04/01/02

Daily Status Report as of 091/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Two Sets of ACS/HFC 9014 (Fine Corrector Alignment)

        The Advanced Camera for Surveys (HFC) was used to optimize the ACS 
image quality over the by adjusting the IM1 and M1 corrector mechanisms in 
both tip/tilt {cylinder rotation} and focus.  This activity uses the same 
target field and exposures as proposal 9013 {ACS Coarse Corrector 
Alignment}, but performs fine focus and tip/tilt scans to refine the 
alignment resulting from that activity.  The proposal completed with no 
reported problems.

    1.2 Completed Six Sets of STIS/CCD 8963 (CCD Bias)

        The Space Telescope Imaging Spectrograph (CCD) was used to measure 
CCD read noise from multiple bias frames obtained in common science modes: 
amplifier D, gains 1 and 4 electrons/DN, and binning factors of 1x1, 1x2, 
2x1, and 2x2.  The read noise measurements before and after NCC turn-on are 
then compared, and standard calibration reference files for use in pipeline 
reduction of SMOV3B data are constructed.  The proposal had no reported 
problems.

    1.3 Completed Eleven Sets of ACS/WFC/HRC 8947 (Weekly Test)

        The Advanced Camera for Surveys (WFC and HRC) was used to perform 
basic tests to monitor, the read noise, the development of hot pixels and 
test for any source of noise in ACS CCD detectors.  This program will be 
executed at least once a day for the entire lifetime of ACS.  There were no 
problems reported.

    1.4 Completed Seven Sets of WF/PC-2 8950 (SM3B Cool Down, Contamination 
Monitor, and Focus Check)

        The WF/PC-2 was used to monitor the planned cooldown to -88C, 
followed by UV monitors, focus checks, as well as decons and associated 
monitors.  No problems were noted.

    1.5 Completed WF/PC-2 9574 (Focus Monitor)

        The WF/PC-2 was used to monitor HST focus.  In principle ACS/HRC 
should provide superior capability for monitoring the HST focus, bur since 
most of the HST science will shift to ACS in Cycle 11 trending observations 
are initiated with this program to establish the focus of WFPC2/PC1 {and 
hence HST} and ACS/HRC {and WFC to a lessor degree} using exposures over 
full orbits that are taken in parallel.  No problems were reported.

    1.6 Completed Five Sets of STIS/CCD 8964 (CCD Darks)

        The Space Telescope Imaging Spectrograph (CCD) was used to obtain 
dark frames twice daily, as in a corresponding calibration 
program.  Standard calibration reference darks are constructed and hot 
pixel lists are updated for use in pipeline reduction of SMOV3B data.  All 
observations completed without incident.

    1.7 Completed STIS/CCD 9157 (Fundamental Properties Of L-Type Dwarfs In 
Binaries)

        The Space Telescope Imaging Spectrograph (CCD) was used to 
characterize the physical properties of eight L-dwarfs in four binary 
systems.  The goal is to obtain astrometric, photometric and spectroscopic 
measurements of each component that will yield basic information on 
atmospheric and dynamical properties.  The proposal completed nominally.

    1.8 Completed Two Sets of FGS/1 8999 (SM3B Jitter Test)

        Fine Guidance Sensor 1R was used in both Position Mode {finelock} 
and Transfer Mode to observe selected targets in order to gain insight into 
the vehicle jitter characteristics after the alterations made to HST during 
SM3B.  No problems were encountered.

    1.9 Completed Two Sets of ACS/WFC/HRC 9031 (CCD Hot Pixel Annealing)

        The Advanced Camera for Surveys (WFC and HRC) was used to perform 
hot pixel annealing, which will be done once per month.  The CCD TECs will 
be turned off and heaters will be activated to bring the WFC detector 
temperature to about +10C.  The HRC temperature will reach about 30C.  This 
state will be held for approximately 24 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 this procedure, a bias and two 
dark images will be taken before and after the annealing procedure for both 
WFC and HRC.  There were no reported problems.

    1.10 Completed WF/PC-2 9069 (Proper Motions in Extragalactic Optical Jets)

        The WF/PC-2 was used to observe the flow velocity of extragalactic 
jets which is a crucial missing parameter in our understanding of these 
objects.  We would like to build on our successful HST proper motion 
measurements in M87, and propose similar measurements in four other optical 
jets.  The proposal completed with no reported problems.

    1.11 Completed Two Sets of FGS/1 9581 (A BEA Science Program: A High 
Angular Resolution Survey of Some of the Galaxy's Most Massive Stars)

        Fine Guidance Sensor #1 was used to make optimal use of otherwise 
unused telescope time while HST's pointing is restricted to the BEA cone 
during the first 12 days of SMOV3B.  The launch date of Feb 29 placed two 
of the Galaxy's most active star forming regions, Trumplers 14 and 16 in 
the Carina Nebula, within the BEA for the entire 12 day period.  FGS1r was 
used to
conduct a high angular resolution survey of the most massive and luminous 
stars in these two magnificent clusters to establish the incidence of 
binarity at the high mass end of the HR diagram. This survey will close the 
detection gap between spectroscopic and speckle surveys in which duplicity 
can be concealed and will dramatically improve our knowledge of the IMF at 
the high mass end of the main sequence as well as the luminosity function 
{LF} of star forming regions which produce such high mass stars.  Finally, 
this survey will identify targets for an approved SIM Key Science project 
to dynamically determine O-star masses.  There was no anomalous activity.

    1.12 Completed Four Sets of WF/PC-2 8953 (SM3B Relative Photometry Check)

        The WF/PC-2 was used to determine relative photometric throughput 
by comparing aperture photometry with pre-SMOV data.  Updates to the 
photometric tables in the pipeline and SYNPHOT database will then be 
performed as needed.  There were no problems with this proposal.

**********************************************************

        The following scheduled proposal did not execute due to the NICMOS 
safing at 087/1910Z:
Thirty-eight Sets of NICMOS/1/2/3 8945 (Cooling System Monitoring)

        The following scheduled proposals did not fully execute due to the 
inhibition of high voltage turn-on commanded at 087/1910Z:

         Two Sets of STIS/MA1/MA2 8965 (MAMA Darks)
         STIS/CCD/MA1 8960 (Jitter Test)
         STIS/CCD/MA1 8962 (Contamination Monitor)

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 18
    Successful: 18

  Scheduled Re-acquisitions: 17
    Successful: 17

    2.2 FHST Updates:
    Scheduled: 32
    Successful: 31

        The roll delay update at 089/080134Z failed due to tracker #3.  The 
subsequent full maneuver updates were successful.  HSTAR 8587 was written.

    2.3 Operations Notes:

        Operations requests were used to:

                 Reset STIS HV event flag at 089/2231Z
                 ACS Fine Corrector Alignment - Part 1 at 089/2229Z
                 Delay STIS MAMA-2 turn-on at 090/0044Z

        The following operations notes were run over the weekend:


                 Lim Chg JERRCNT at 088/1752Z
                 Turn on ACS HRC/SBC corrector status limit at 088/1755Z
                 WF/PC-2 recom at 089/0435Z to 089/1414Z
                 PCS Gyro #2 limit change

        The NICMOS Cryo Cooler cool down continues nominally.

        SI C&DH errors were cleared at 088/1651Z and at 088/1923Z per ROP NS-5.

        The Zone 2B temperature (OTCZ2BT) began flagging out-of-limits 
intermittently at 089/040046Z.  The low value was 17.8714 degC.  HSTAR 8588 
was written.

        The NSSC-1 status buffer was dumped and reset at 089/0443Z, using 
ROP NS-3.

        Per HSTAR 8586, the RGA 2 motor current (GRG1_2MC) briefly flagged 
out-of-limits high at 089/061634Z with a value of 128.8.  The increase in 
current was expected due to the gyro 1 turn-off.

        The 486 engineering status buffer limits were adjusted at 089/0801Z 
as directed by ROP DF-18A.

        Using ROP SR-9A, the SSR-3 EDAC error counter was cleared at 089/1217Z.

        The SSR-1 EDAC error counter was cleared at 090/1406Z per ROP SR-1A.

        ESTR-2 was reconditioned at 090/1507Z per ROP RD-7A.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of Servicing Mission Orbital Verification and the 
gradual resumption of normal science observations and calibrations.

/CAW