HUBBLE SPACE TELESCOPE

                           DAILY REPORT #2400

PERIOD COVERED:  0000Z (UTC) 06/23/99 - 0000Z (UTC) 06/24/99

Daily Status Report as of 175/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of STIS/CCD 7949 (CCD Dark and Bias Monitor --
Cont. to June 99)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
CCD dark calibration and a bias monitoring program.  It was also scheduled
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 Two 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.

   1.3 Completed WF/PC-2 6355 (A UV Atlas of Nearby Galaxies)

       The WF/PC-2 was used to make ultraviolet observations of the nearby
galaxy NGC-4772.  The aim of the project is to build a reference
ultraviolet atlas of galaxies whose optical images are well known, with the
highest possible degree of information, covering all the morphological
types and luminosity classes.  The observations were executed as scheduled,
and no anomalies were noted.

   1.4 Completed Five Sets of STIS/CCD 8406 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted
parallel Condition V proposal.  The observations were completed as
scheduled, and no anomalies were reported.

   1.5 Completed Two Sets of WF/PC-2 6815 (The Origin of the Polarization
in the Gravitationally Lensed "Cloverleaf" BAL QSO)

       The WF/PC-2 was used to obtain polarimetry that will explore the
polarization mechanism operating in the gravitationally lensed "Cloverleaf"
broad absorption line {BAL} QSO H1413+1143.  The observations were
completed, and there were no reported anomalous activity.

   1.6 Completed Five Sets of WF/PC-2 8053 (WF/PC-2 Cycle-7 Earth Flats --
Part II)

       The WF/PC-2 was used to take Earth flat calibration images.  This
proposal obtains sequences of Earth streak flats to construct high quality
flat fields for the WF/PC-2 filter set.  The observations were executed as
scheduled, and no anomalies were noted.

   1.7 Completed STIS/CCD 8470 (POMS Test Proposal: STIS Non-Scripted
Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
 galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted
parallel Condition VI proposal.  The observations were completed as
scheduled, and no anomalies were reported.

   1.8 Completed Two Sets of WF/PC-2 6967 (Blue Continuum Snapshots of 3CR
Radio - Continued Galaxies)

       The WF/PC-2 was used to make observations of the radio galaxies
3C234.0 and 3C346.0.  Radio galaxies are an important class of
extragalactic objects: they represent one of the most energetic
astrophysical phenomena and they may be used as probes of their
environments.  They are unique probes of the early Universe.  The
observations were completed as planned, and no problems were reported.

   1.9 Completed WF/PC-2 6351 (Resolving SDB Binary Systems)

       The WF/PC-2 was used to make high resolution image of the sdB class,
>binary system STAR-10433 in order to try and resolve its two individual
stars.  Evidence has accumulated that a large fraction (if not all) of the
sdB class stars are found in binary systems.  The observations were
executed as scheduled, and no anomalies were noted.

   1.10 Completed WF/PC-2 8274 (A Size Survey of Cometary Nuclei)

       The WF/PC-2 was used to make observations of the comet Temple 2 as
part of a size survey of cometary nuclei.  This is part of a program to
determine the basic physical properties of a large fraction of the
population of short-period comets.  The observations were completed as
planned, and no anomalies were reported.

   1.11 Completed STIS/CCD/MA1 7345 (Origin and Physical Conditions in the
Local Lyman-Alpha Forest)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
observations of IIZW136 in order to study the origin and physical
conditions in the local Lyman-Alpha forest.  A wavelength calibration image
was also taken.  The observations were executed as scheduled, and no
anomalies were noted.

   1.12 Completed Four Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II
Parallel Archive Proposal Continuation)

       The WF/PC-2 was used in the parallel mode to make some low galactic
latitude archive observations.  The program will be used to take parallel
images of random areas of the sky.  The observations were executed as
scheduled, and no anomalies were noted.

   1.13 Completed WF/PC-2 8436 (POMS Test Proposal: WFII Backup Parallel
Archive Proposal II)

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

   1.14 Completed STIS/CCD/MA1 8287 (A Search For Transparent Lines of
Sight With Intergalactic He-II Obsorption Towards 26 Bright z > 2.9 Quasars)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make He-II absorption line observations of quasar HE2348-144.  The aim is
to identify more suitable bright objects for detailed studies of
intergalactic He-II absorption at a redshift of Z <2.9 and >3.2 .  A
wavelength calibration observation was also taken.  The observations were
executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 9
                                        Successful : 9

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates:

                              Scheduled : 19
                             Successful : 19

   2.3 Operations Notes:

       Using ROP SR-1, the SSR EDAC error counter was cleared four times.

       The STIS MCE-2 reset at 174/1140641Z while the low voltage was on
and while outside an SAA interval.  The STIS flight software error counter
was reset at 174/1411Z per ROP NS-12.  The MAMA-2 will be recovered at
175/1048Z via normal SMS commanding.

       In preparation for GSFC Internal Simulation #6 (EVA-1), the flight
operations team transferred to the PRS ground system at 174/1105Z, and
began using the SAMS back-up facility at 174/2111Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH