HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2401

PERIOD COVERED:  0000Z (UTC) 06/24/99 - 0000Z (UTC) 06/25/99

Daily Status Report as of 176/0000Z

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 Four 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.  

   1.4 Completed WF/PC-2 7622 (WF/PC-2 Cycle 7 Internal Monitor)

       The WF/PC-2 was used to make a set of Cycle 7 internal monitoring
calibration measurements.  A variety of internal exposures are obtained in
order to provide a monitor of the integrity of the CCD camera electronics in
both bays {gain 7 and gain 15}, a test for quantum efficiency in the CCDs, and
a monitor for possible buildup of contaminants on the CCD windows.  A bias
calibration and an internal flat calibration image were also taken.  The
observations were executed as scheduled, and no anomalies were noted.  

   1.5 Completed Two Sets of 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.  

   1.6 Completed 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.

   1.7 Completed 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.  

   1.8 Completed Two Sets of WF/PC-2 6355 (A UV Atlas of Nearby Galaxies)

       The WF/PC-2 was used to make ultraviolet observations of the nearby
galaxies NGC-3043 and NGC-3448.  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. 

   1.9 Completed WF/PC-2 6354 (Measuring Luminosity Evolution in Z = 0.3 Field
Galaxies)

       The WF/PC-2 was used to make snapshot observations of the galactic
cluster Gal-Cluster-0732 located at a distance of Z = 0.3.  The targets were
drawn from a much larger pool of galaxies for which the internal kinematics
have been measured from an extensive ground based program.  The observations
were executed as scheduled, and no anomalies were noted.

   1.10 Completed STIS/CCD/MA1 8182 (The Extent of Metal Transport in the Low
Redshift Intergalactic Medium)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
observations of galaxy H1821+643 to measure the extent of metal transport in
the low redshift intergalactic medium.  Such studies are possible only at the
lowest redshifts, where we know the locations of the Lyman-Alpha clouds from
HST spectroscopy and the galaxies from ground-based redshift surveys.  A
wavelength calibration image was also taken.  The observations were executed as
scheduled, and no anomalies were noted.  

   1.11 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 galaxy 3C219.0. 
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.  

   1.12 Completed WF/PC-2 8054 (WF/PC-2 Linear Ramp Filters Calibration)

       The WF/PC-2 was used to make observations of the standard star
GRW+70D582 in order to execute a series of linear ramp filter calibrations. 
The observations were completed as planned, and no problems were reported.  

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 8
                                        Successful : 8

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates: 

                              Scheduled : 14
                             Successful : 14

   2.3 Operations Notes: 

       HST operations continue to be executed from the SAMS back-up facility. 
PRS2 was switched to at 175/1640Z due to a bad patch at the SAMS facility. 
SAMS/PRS was utilized again beginning at 175/2110Z.

       GSFC Internal Simulation #6 (EVA-1) was successfully conducted yesterday
in the STOCC and surrounding areas.

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

       A TTR was written for arecoverable, 19-second dropout of engineering
data at 175/1400Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science observations and calibrations.

/DMH