HUBBLE SPACE TELESCOPE
                       DAILY REPORT #1927

PERIOD COVERED:  0000Z (UTC) 07/24/97 - 0000Z (UTC) 07/25/97

Daily Status Report as of 206/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed STIS/CCD 7659 (Daily Darks to Update Acquisition Bad Pixel
Table)

       The Space Telescope Imaging Spectrograph (CCD) was used to make dark
calibration images in order to update the acquisition bad pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were executed as scheduled, and no anomalies were noted.

   1.2 Completed Six Sets of NIC/1/2/3 7779 (NICMOS One Orbit Parallel -
Camera 3 Focus)

       The Near Infrared Multi-Object Spectrograph (Cameras One, Two and
Three) was used to conduct a one-orbit camera focus test taken in parallel
with the prime science observations.  The tests were completed as
scheduled, and no anomalies were noted.

   1.3 Completed Four Sets of STIS/CCD 7601 (CCD Dark and Bias Monitor)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct
bias and dark monitoring.  Also, observations were made to track the growth
of hot pixels on the CCD in general and within the various target
acquisition apertures specifically.  The observations were completed as
planned, and no anomalies were reported.

   1.4 Completed Three Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental
Darks PT1/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This set of dark calibrations is intended to obtain three dark frames every
day to provide data for monitoring and characterizing the evolution of hot
pixels.  The observations were executed as scheduled, and no anomalies were
noted.

   1.5 Completed Two Sets of STIS/CCD 7675 (STIS Non-Scripted Parallel
Archive Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used in the
parallel mode to obtain slitless spectroscopy with the G750L grating to
search for emission line galaxies at intermediate to high redshift.  The
observations were completed as planned, and no anomalies were reported.

   1.6 Completed Two Sets of STIS/CCD 7276 (Synoptic Monitoring of Seasonal
Phenomena on Mars)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
seasonal ultraviolet imaging of the planet Mars.  This season includes the
formation of the north polar cap and hood system, a process which is not
well documented; the start of the classic dust storm season on Mars, when
large dust storms have often occurred; and an active cycle of small dust
storms in Hellas.  These observations will complete a period of continuous
monitoring of Mars which commenced in Cycle 6.  The observations were
completed as planned, and no problems were reported.

   1.7 Completed NIC/2 7455 (The Inner Region of the Starburst Galaxy
NGC-5102.)

        The Near Infrared Camera (Camera Two) was used to make observations
of the inner starbursting regions of galaxy NGC-5102.  This nearby (3.5
Mpc) galaxy is of classical SO appearance which has undergone a recent
starburst in its nucleus, bulge and disk.  The observations were executed
as scheduled, and no anomalies were noted.

   1.8 Completed FGS 7598 (Long Term Stability of Transfer Scan Mode in FGS #3)

       The Fine Guidance Sensor (FGS #3) was used to make observations of
standard star UPGREN69 in order to study the long term stability of the
transfer scan mode order to study the long term stability of that mode.
The observations were completed as planned, and no problems were reported.

   1.9 Completed FGS 7597 (Long Term Stability of Transfer Scan Mode in FGS-1R)

       The Fine Guidance Sensor (FGS-1R) was used to make observations of
the standard star UPGREN69 in order to study the long term stability of the
transfer scan mode.  The observations were executed as scheduled with no
anomalies.

   1.10 Completed STIS/CCD/MA2 7089 (STIS MAMA Coronograph Occulting Bar
Scattered Light)

       The Space Telescope Imaging Spectrograph (CCD and MA #2) was used to
make observations of star GD50 in order to study the scattering of light by
the coronograph occultation bar for far-ultraviolet and near-ultraviolet
MAMA observations.  The observations were completed as planned, and no
anomalies were reported.

   1.11 Completed Two Sets of WF/PC-2 7619 (WF/PC-2 Cycle 7 Decontamination)

       The WF/PC-2 was used to conduct a Cycle 7 decontamination procedure.
Ultraviolet-blocking contaminants are removed and hot pixels cured, by
warming the CCDs to +20C for six hours.  A variety of internal images are
taken before and after the decontamination in order to verify its success
and to monitor the instrument health.  The procedures were conducted as
scheduled, and no problems were reported.

   1.12 Completed NIC/3 7780 (NICMOS Short One Orbit Parallel - Camera 3
Focus Test)

       The Near Infrared Camera (Camera Three) was used to conduct a short
one orbit focus test which was conducted in parallel with the prime science
observations.  The observations were completed as scheduled with no
anomalies.

   1.13 Completed STIS/MA1 7097 (STIS MAMA Vignetting, Spatial Resol. In
Spectroscopic Modes)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
spectrographic observations of star GD153 in order to study the systems
vignetting and spatial resolution.  These observations are intended to
measure STIS relative response to a point source in the first order modes
along the slit direction.  The observations were executed as scheduled, and
no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 5
                                        Successful : 5

                          Scheduled Reacquisitions : 10
                                        Successful : 10

   2.2 FHST Updates:

                              Scheduled : 10
                             Successful : 10

   2.3 Operations Notes:

       The SSR Interrupt Log was dumped at 205/2041Z.

       As documented in HSTAR 6131, the STIS MCE reset outside of the South
Atlantic Anomaly Region 1 at 206/022416Z when the MAMA1 high voltage (HV)
monitoring detected an out-of-limit condition and turned off the MCE HV.
The STIS internal logs were dumped at 206/0424Z, and the UPSET counter and
the CS error counter were cleared at 206/0531Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH