HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2172

PERIOD COVERED:  0000Z (UTC) 07/23/98 - 0000Z (UTC) 07/24/98

Daily Status Report as of 205/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed STIS/CCD 7948 (CCD Dark and Bias Monitor -- Cont. to Dec. 98)

       The Space Telescope Imaging Spectrograph (CCD) was used to measure
CCD dark current and bias rates for the two supported amplifier settings
{GAIN=1 and GAIN=4} in order to gather data for making superdarks and
superbiases.  The data will be used to track the growth of hot pixels on
the CCD in general and within the various target acquisition apertures
specifically.  The observations were executed as scheduled, and no
anomalies were noted.

   1.2 Completed NIC/1/2/3 7859 (Blue Compact Dwarf Galaxies -- Young or Old?)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the compact young dwarf galaxy NGC-4214.  These blue
compact dwarf galaxies challenge models of galaxy formation to explain the
presence of small, low-metallicity galaxies experiencing vigorous bursts of
star formation.  The observations were completed as scheduled, and no
problems were reported.

   1.3 Completed Nine Sets of STIS/CCD 8064 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal - Backup)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
non-scripted parallel POMS test.  The observations were completed as
scheduled, and no problems were reported.

   1.4 Completed Three Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental
Darks pt2/3)

       The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks.  This dark calibration program obtains 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 WF/PC-2 7623 (WF/PC-2 Cycle 7 Internal Flats)

       The WF/PC-2 was used to make a set of internal Cycle 7 calibration
flats which are designed to monitor the pixel to pixel flat field response
and the visflat lamp degradation, as well as detect any possible changes
due to contamination.  The calibration observations were completed as
planned, and no problems were reported.

   1.6 Completed STIS/CCD 7928 (STIS Spectroscopic CCD Flatfielding --
Continued)

       The Space Telescope Imaging Spectrograph (CCD) was used to make CCD
flat field calibration images in the STIS spectroscopic mode.  The
calibrations were completed as planned, and no problems were reported.

   1.7 Completed Four Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

       The WF/PC-2 was used to make parallel observations as part of the
POMS test proposal.  This test proposal is designed to simulate scientific
plans.  The observations were completed as planned, and no problems were
reported.

   1.8 Completed NIC/2 7835 (A Search for Superplanets Embedded in Beta Pic
& Vega-like Circumstellar Disks)

       The Near Infrared Camera (Camera Two) was used to make observations
of the circumstellar disk around star HD102647 in order to search for
superplanets.  The discovery of a circumstellar disk orbiting Beta Pictoris
as well as the discovery of other similar IR-excess Vega-like systems have
provided compelling evidence that our solar system, or at least many of the
processes which are thought to have created it, may be far from unique.
The observations were executed as scheduled, and no anomalies were noted.

   1.9 Completed STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements.  These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  The observations were completed as
scheduled, and no problems were reported.

   1.10 Completed STIS/CCD/NIC/2/3/WF/PC-2 7778 (Absorption Lines From Very
Highly Ionized Atoms in Front of Quasars)

       The Space Telescope Imaging Spectrograph (CCD), the WF/PC-2 and the
Near Infrared Camera (Cameras Two and Three) were used to make observations
of quasar HS1700+641 to study foreground absorption lines from highly
ionized atoms.  Bright quasars that have a large z{em} and no intervening
Lyman-limit systems with large column densities present an excellent
opportunity to learn more about distant intergalactic gas regions at very
high temperatures.  The observations were executed as scheduled, and no
anomalies were noted.

   1.11 Completed STIS/MA1 7471 (STIS Snapshot Search for UV-bright High
Redshift Quasars)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
ultraviolet observations of the bright high redshifted quasar HS1111+791.
This quasar shows no signs of strong absorption in its optical spectra, and
its He-II Lambda 304 A0 line is accessible with HST.  The observations were
executed as scheduled, and no anomalies were noted.

   1.12 Completed NIC/1/2/3 7855 (The Evolution of Powerful Radio Galaxies)

       The Near Infrared Camera (Camera One, Two and Three) was used to
make observations of the powerful radio galaxy 3C456.  Our proposed NICMOS
observations combined with our multi-wavelength observing program will
finally provide us with the data we need to build a picture of how powerful
radio galaxies evolve.  The observations were completed as planned, and no
porblems were reported.

   1.13 Completed NIC/1/2/3 7824 (Deep NIC Images of 20 High-Z Damped
Ly-Alpha Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the high-Z damped Lyman-Alpha (DLA) galaxy PKS0458-02.
The HST imaging together with ground-based spectroscopy will unify
absorption-line studies and faint galaxy imaging studies, providing a
comprehensive picture of the history of assembly, star formation, gas
consumption, and chemical enrichment in the DLA galaxies.  The observations
were completed as planned, and no problems were reported.

   1.14 Completed WF/PC-2 8061 (POMS Test Proposal: WF-II Backup Parallel
Archive Proposal)

       This is a POMS test proposal designed to simulate scientific plans.
The proposal was executed as planned, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 7
                                        Successful : 7
                          Scheduled Reacquisitions : 4
                                        Successful : 4

       As detailed in HSTAR 6592 there was a one-minute, 25-second loss of
lock beginning at 205/010605Z.  One observation in each of two proposals
(occurring during the period of the next report) were affected: STIS 8064
(POMS Test Proposal: STIS Non-Scripted Parallel Proposal - Backup) and
NICMOS 7829 (Mapping H_2 Emission around T Tauri Stars) were affected.


   2.2 FHST Updates:

                              Scheduled : 9
                             Successful : 9

   2.3 Operations Notes:

       The SSR EDAC error counter was cleared five times using ROP SR-1.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH