From: hst-status@stsci.edu
Subject: HST STATUS REPORT, 12/22 - 12/23
Organization: Space Telescope Science Institute
Date: Mon, 28 Dec 1992 18:18:36 GMT

                            HUBBLE SPACE TELESCOPE
                               DAILY REPORT #790

PERIOD COVERED:  0800 EST 12/22/92 - 0800 EST 12/23/92

Daily Status Report as of 358/1200Z.

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed GHRS/2 2536 (Deuterium in the Local Interstellar Gas)

       The High Resolution Spectrograph used its Echelle spectrograph
       to make observations of interstellar absorption lines in the spectra
       of white dwarf star G191-B2B. The first four observations were: two
       deflection calibrations, a spiral search, and the peakup. There were 15
       spectral observations which followed. All of the observations were
       made in course track, and all were reported to be okay. 

   1.2 Completed Two Sets of PC 4714 (Internal Delta Flats)

       A total of nine internal flat observations were made with the
       Planetary Camera. These images will be used for the restoration of
       Earth flats, which are altered due to the changes in quantum
       efficiency which occur after a WFPC decontamination operations. All
       of the internal flats were received and displayed. They were all
       okay. 


   1.3 Completed Two Sets of S/C 4215 (FGS ITS Test)

       The Fine Guidance Sensor internal test was executed as scheduled,
       and no problems were reported. 

   1.4 Uplinked Updated Ephemeris Tables, Per MOSES 2871

       Uplinked at 358/0100Z.

   1.5 Completed FOS/RD 3816 (White Dwarf Stars)

       The Faint object Spectrograph was used to obtain spectral
       observations of white dwarf star L151-81. The onboard target
       acquisition was successful. The OSS monitored the first spectral
       observation, and it was successful. The other observations occurred
       during LOS, and still are on the science tape recorder. 

   1.6 Completed PC 4106 (HST Medium Deep Survey: Low Latitude)

       The Planetary Camera was used to make low latitude observations in
       parallel with the prime science observations. This is to provide for
       serendipitous discoveries and data for a basic sky survey. The
       observations were monitored in the OSS, and no problems were
       reported. 

   1.7 Completed WFC-PC 4109 (Rapid Internal Monitor)

       Both the Wide Field Camera and the Planetary Camera were used to
       obtain internal flat observations using filter F555W. This operation
       is to check for different forms of contamination (i.e., daises and
       measles). The internal flat observations were monitored in the OSS,
       and no problems were reported. 

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 1
                                        Successful : 1
                          Scheduled Reacquisitions : 7
                                        Successful : 7
                                    Losses of Lock : 0

   2.2 FHST Updates: 

                              Scheduled : 7
                             Successful : 7

   2.3 Significant HSTARs: None

   2.4 Operations Note: None

3.0 ACTIVITIES SCHEDULED FOR NEXT REPORTING PERIOD:

   3.1 Complete Two Sets of GHRS 2536 (Deuterium in the Local Interstellar
       Gas) 

   3.2 Complete Two Sets of PC 3912 (Cores of Early Type Galaxies)

   3.3 Complete FOS/BL 3939 (Lyman Alpha Regions in QSOs)

   3.4 Complete HSP/UV2 1099 (Active Galactic Nuclei)

   3.5 Complete Uplink Updated Ephemeris Tables, Per MOSES 2871

   3.6 Complete Two Sets of FGS 3688 (Diagnostic of Early Type Stellar
       Evolution) 

   3.7 Complete HSP/UV1-PC 4741 (Orbital Effects Test Calibration)

   3.8 Complete One Set of FOS/RD 3816 (White Dwarf Stars) and Initiate a 
       Second.

   3.9 Complete PC 4106 (HST Medium Deep Survey: Low Latitude)

   3.10 Complete PC 4347 (Flood Retention Test)

   3.11 Complete FOS/RD 3566 (Do Galaxies Produce Absorption Lines)

   3.12 Complete WFC 4105 (HST Medium Deep Survey: High Latitude)

   3.13 Complete PC 4712 (Measles Monitor)

   3.14 Complete HSP/UV1 3257 (Periodic Variations in DQ Herculis Stars)

   3.15 Complete PC 3657 (The Host Galaxies of the BL Lacertea Objects)

   3.16 Complete PC 4349 (Black Holes, Stellar Dynamics and Populations)

   3.17 Complete PC 4140 (Rapid Internal Monitor - Part 2)

   3.18 Complete PC 3286 (Nuclei of Nearly Normal Galaxies)

   3.19 Complete FOC/96 4107 (Search for QSOs Suitable for Subsequent 
        Observations)

   3.20 Complete WFC-PC 4109 (Rapid Internal Monitor)

   3.21 Complete S/C 4215 (FGS ITS Test)

   3.22 Complete HRS/2 4065 (Dark Noise Monitoring)

   3.23 Complete FOC/96 3504 (Resolution Imaging and Spectroscopy of AGN)

   3.24 Complete WFC 2227 (Determination of Extra-galactic Distance Scale:
        M-81) 

   3.25 Complete GHRS/2 3706 (Nature of Gaseous Loops in the Milky Way 
        Halo)

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
       (today) and the start of Dec. 24 (tomorrow). 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). 

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