HUBBLE SPACE TELESCOPE

                        DAILY REPORT #2096

PERIOD COVERED:  0000Z (UTC) 04/06/98 - 0000Z (UTC) 04/07/98

Daily Status Report as of 097/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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.

   1.2 Completed STIS/CCD 7926 (CCD Dark and Bias Monitor -- Continued)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
several dark and bias calibration observations.  This is 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.  These observations will also 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.

   1.3 Completed STIS/CCD 7803 (Daily Darks to Update Acquisition Bad Pixel
Table Part III)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
daily dark calibration updates.  These daily darks are intended to identify
hot pixels for update to the acquisition on-board FSW hot pixel table.
Daily hot pixel lists can also be used for science data analysis.  The
observations were completed as planned with no anomalies.

   1.4 Completed NIC/1/2/3 7172 ([Fe-II] AND [Si-VI] Line Imaging of
Seyfert Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of Seyfert Galaxy NGC-3227 to study Fe-II and Si-VI line
imaging.  The two forbidden lines [Fe-II] and [Si-VI] have very different
critical densities and would be expected to originate from very different
regions in a Seyfert galaxy nucleus.  The observations were completed as
planned, and no problems were reported.

   1.5 Completed Nine Sets of STIS/CCD 7908 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations as part of the POMS Test Proposal.  This was a
STIS non-scripted parallel proposal.  As recorded in HSTAR 6428 and in 2.1,
the acquisition and for the final two iterations of this proposal failed,
and the take data flag remained down.  Otherwise, the observations were
completed as planned, and no further problems were reported.

   1.6 Completed Two Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats)

       The WF/PC-2 was used to make a series of Earth flat calibration
images.  These flat fields will allow mapping of the OTA illumination
pattern and will be used in conjunction with previous internal and external
flats to generate new pipeline superflats.  The observations were completed
as planned, and no anomalies were reported.

   1.7 Completed Five Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard Darks)

       The WF/PC-2 was used to make a series of Cycle 7 standard dark
calibration images.  This dark calibration program obtains dark frames
every week in order to provide data for the ongoing calibration of the CCD
dark current rate, and to monitor and characterize the evolution of hot
pixels.  The observations were executed as scheduled, and no anomalies were
noted.

   1.8 Completed NIC/1/2/3 7850 (Cosmological Parameters Omega and Lambda
from High-Z Type Ia Supernovae)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of high-Z type Ia Super Nova 11H0.9Z2 in order to measure
the Omega and Lambda parameters.  Type Ia supernovae can be used as
calibrated standard candles to measure large distances.  The observations
were completed as planned, and no anomalies were reported.

   1.9 Completed Six 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.  As recorded in HSTAR 6428 and in 2.1, the acquisition for the final
iteration of this proposal failed, and the take data flag remained down.
Otherwise, the observations were completed as planned, and no further
problems were reported.

   1.10 Completed Two Sets of NIC/1 7866 (Multi-Wavelength Monitoring of
the M-87 Jet)

       The Near Infrared Camera (Camera One) was used to make
multi-wavelength observations of the jet in Galaxy M-87.  Monitoring
programs have reveals striking evolution in the jet structure over a 2 year
period.  The observations were executed as scheduled, and no anomalies were
noted.

   1.11 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 with no problems.

   1.12 Completed Two Sets of WF/PC-2 7590 (Cosmological Parameters Omega
and Lambda From High-Redshift Type IA Supernovae)

       The WF/PC-2 was used to make observations of type 1A supernovei
14H0.9Z1 and 14H0.9Z2 in order to study thier redshift.  The HST was used
to make direct measurements of the cosmological parameters Omega, Lambda,
and curvature using Type 1A supernovae as a calibrated "standard candle".
The observations were executed as scheduled with no anomalies.

   1.13 Completed NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

       The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime.  The observations were completed as planned, and no
anomalies were reported.

   1.14 Completed NIC/1/2/3 7250 (Ionized Tails From Supergiants at the
Galactic Center)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the ionized tail on the supergiant star GC-A which is
located near the galactic center.  The strong ultraviolet field at the
galactic center is capable of ionizing the winds from late-type
supergiants.  As described in 2.1 and in HSTAR 6427, an acquisition in the
middle of this proposal defaulted to fine lock back-up on one FGS only.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

   1.15 Completed NIC/1/2 7864 (The Host Galaxies of Radio-Quiet High-
Redshift Quasars)

       The Near Infrared Camera (Cameras One and Two) was to be used to
make observations of the radio-quite, high red shifted quasar MZZ4935 and
its host galaxy.  The underlying causes of the rapid cosmological evolution
of the quasar population are a mystery around which are woven many
different strands of contemporary cosmology.  As recorded in HSTAR 6428 and
in 2.1, the acquisition and re-acquisitions for this proposal failed, and
the take data flag remained down.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 8
                                        Successful : 7

       The acquisition at 096/203145Z defaulted to fine lock back-up on
FGS-3 only when the FGS-1 scan step limit was exceeded.  HSTAR 6427 was
written.  The proposal outlined in 1.14 may have been affected.

       The acquisition scheduled for 096/224321Z failed when the FGS V1
attitude error vector went out of limits high and the FGS-1 scan step limit
was exceeded.  The re-acquisitions at 096/2355Z, 097/0139Z, and 097/0322Z
also failed.  HSTAR 6428 was written.  The proposals described in 1.5, 1.9,
and 1.15 were affected.

                          Scheduled Reacquisitions : 6
                                        Successful : 3

   2.2 FHST Updates:

                              Scheduled : 16
                             Successful : 16

   2.3 Operations Notes:

       The SSR EDAC error counter was cleared on two occasions using ROP
SR-1.

       As documented in HSTAR 6426, engineering data scheduled to be
recorded between 096/000300Z and 096/001300Z was not present upon analysis
by PASSOPS personnel.  Per ROP SR-1, the data was re-dumped.  The data was
still missing.

       The threshold limit for MAMA-1 was adjusted at 096/1247Z per
Operations Note 425.

       The six ephemeris tables were successfully uplinked at 097/0244Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH