From: hst-status@stsci.edu
Subject: HST STATUS REPORT, 12/18 - 12/21
Organization: Space Telescope Science Institute
Date: Tue, 22 Dec 1992 15:17:27 GMT

                            HUBBLE SPACE TELESCOPE
                               DAILY REPORT #788

PERIOD COVERED:  0800 EST 12/18/92 - 0800 EST 12/21/92

Daily Status Report as of 356/1200Z.

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Six Sets of GHRS/2 3482 (Nature and In-Falling of Matter
       on Star Beta Pictoris) 

       The High Resolution Spectrograph was used to make ultraviolet
       observations of the gaseous disk around star Beta Pictouis (aka,
       HD39060) looking for cometary like objects which might be falling in
       to the disk and evaporating on contact. A total of 24 spectra were
       received and displayed. They were reported to be okay. Two
       observations did not occur because of GHRS carousel reset problems. 

   1.2 Uplinked Updated Ephemeris Tables, Per MOSES 2871

       Uplinked at 354/0102Z and 356/0057Z.

   1.3 Completed PC 4093 (Survey of Nuclear Regions of Markarian Galaxies)

       The Planetary Camera was used to take two images of two separate
       Markarian galaxies (MARK 382 and NGC-985) looking in their inner
       core regions and using filter F785LP. Both images were received and
       displayed in the OSS. Both images were reported to look okay. 

   1.4 Completed WFC/PC 4109 (WF/PC Calibration:Rapid Internal Monitor)

       Both the Planetary Camera and the Wide Field Camera were used to
       take internal flat observations which are checking for different
       forms of contamination (i.e., daisies and measles). The OSS
       monitored the observations and assessed the quality of the data. No
       problems were reported. 

   1.5 Completed Two Sets of GHRS/2 4068 (GHRS Detector Calibrations)

       The High Resolution Spectrograph was used to make internal flat
       calibration observations to check on the stability of the detectors.
       The observations were received and displayed. No problems were
       reported. 

   1.6 Completed PC 4140 (WF/PC Calibration: Rapid Internal Monitor Part 2) 

       The Planetary Camera was used to make two internal flat observations
       checking on new forms of contamination, and the reappearance of
       quantum efficiency hysteresis. Both images were received and
       displayed. They both were reported to look okay. 

   1.7 Completed PC 4163 (Evolution of Solar Nebulae Surrounding Pre-Main 
       Sequence)

       The Planetary camera was used to make internal Earth flat
       calibration images to be used later to process images of nebulae
       around pre-main sequence stars. Five images were received and
       displayed. Three images were reported to be saturated, one was
       underexposed, and one was reported to be okay. 

   1.8 Completed GHRS/2 4065 (Dark Noise Monitoring HRS)

       The High Resolution spectrograph was used to make internal dark
       observations to check on the levels of detector dark noise. The
       observations were executed as scheduled, and no problems were
       reported. 

   1.9 Completed PC 3551 (Elliptical Galaxies with Kinematically Distinct
       Nuclei) 

       The Planetary Camera was used to take two image of elliptical galaxy
       NGC-4494 looking at the stellar component of its nucleus. It is
       known to be kinematically distinct from the stars in the rest of the
       galaxy. Both observations were received and displayed. Both were
       reported to look okay. 

   1.10 Completed FOC/96 4096 (Far Ultraviolet Spectra of High redshift 
       Quasars)

       The Faint Object Camera (f/96) was used to obtain three ultraviolet
       objective prism images of high red shift quasar Q1451+124. All three
       images were received and displayed. It was noted that they all had a
       background level of around 7-10 counts, which is higher than usual. 

   1.11 Completed FOS/BL 3816 (White Dwarf Stars)

       The Faint Object Spectrograph was used to obtain spectral
       observations of white dwarf stars. Three observations were received
       and displayed. The first observations was a binary target
       acquisition, and had ten groups. The following two observations were
       reported to look okay. Shortly after the FOS came up to its final
       high voltage, a status buffer error message was received. It appears
       to be caused by a GIMP test. An HSTAR was written. 

   1.12 Completed WFC 4105 (HST Medium Deep Survey,High Latitude)

       The Wide Field Camera was used to take an image to be used for a
       high latitude survey. This image was taken in parallel with the
       prime science observations. It was received and displayed in the
       OSS. It was reported to look okay. 

   1.13 Completed WFC 4713 (Internal Delta Flats)

       The Wide Field Camera was used to make position measurements of the
       star Proxima Centauri to determine the presence of a Jupiter sized
       planet in orbit around the star. The observations were complete as
       scheduled, and no problems were reported. 

   1.14 Completed GHRS/2 2851 (Pulse Height Analysis (PHA))

       The High Resolution Spectrograph was used to make internal flat
       observations which will be used for the restoration of Earth flat
       images. These were altered due to changes in the quantum efficiency
       which occurred after WFPC decontamination operations. The
       observations were monitored in the OSS. No problems were reported. 

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 11
                                        Successful : 11
                          Scheduled Reacquisitions : 31
                                        Successful : 31
                                    Losses of Lock : 2

                                   (LOL at 355/1927, and 2104Z)


   2.2 FHST Updates: 

                              Scheduled : 21
                             Successful : 21

   2.3 Significant HSTARs: None

   2.4 Operations Note: None

3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD:

   3.1 Complete FGS 4031 (A Search for Planetary Companions to Low Mass)

   3.2 Complete Three Sets of PC 4714 (Internal Delta Flats)

   3.3 Complete GHRS/2 3964 (Dynamics and Energy Balance in Stellar 
       Regions)

   3.4 Complete FOC/96 3428 (High Voltage Turn On)

   3.5 Initiate GHRS/2 2536 (Deuterium in the Local Interstellar Gas)

4.0 ANOMALY STATUS:
	
   4.1 Significant New Anomalies: None

   4.2 Significant Unresolved Anomalies: None
 
 5.0 SIGNIFICANT FORTHCOMING EVENTS:

       There will be a partial eclipse of the Sun at the end of Dec. 23 and
       the start of Dec. 24. This will effect two orbital passes of the
       Space Telescope, one orbit in each day. The First orbit will be
       effected for a 20 minute period, with a maximum of 37% reduction in
       Sun light. The second orbit will be effected for six minutes, with a
       2.4% reduction in Sun light. The Battery Rate of Charge Test will be
       disabled in the EPS System, and the Course Sun Sensors in the PCS
       System. 
 

       Due to the Christmas and New Years holidays no daily reports will be
       written on Thursday Dec. 24, Friday Dec. 25, and Friday Jan. 1. A
       daily report will be written Monday Through Thursday (Dec. 28 - Dec.
       31). 

                             -END-
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