Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_07_27_00 Дата изменения: Thu Jul 27 15:46:16 2000 Дата индексирования: Sun Dec 23 10:15:36 2007 Кодировка: Поисковые слова: comet

HUBBLE SPACE TELESCOPE

DAILY REPORT #2673

PERIOD COVERED: 0000Z (UTC) 07/26/00 - 0000Z (UTC) 07/27/00

Daily Status Report as of 209/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed Two Sets of WF/PC-2 8826 (Cycle 9 Supplemental Darks pt 1)

The WF/PC-2 was used to perform a T dark calibration program that
obtains three dark frames every day in order to provide data for monitoring
and characterizing the evolution of hot pixels. There were no reported
anomalies.

1.2 Completed WF/PC-2 8645 (A Survey of Mid-UV Morphology of Nearby
Galaxies: Galaxy Structure and Faint Galaxy)

The WF/PC-2 was used to investigate the relation between star
formation and the global physical characteristics of galaxies to interpret
the morphologies of distant galaxies in terms of their evolutionary
status. The observations completed nominally.

1.3 Completed Two Sets of STIS/CCD 8808 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation III)

The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted, parallel observations as part of a POMS test proposal. The
observations completed with no anomalous activity.

1.4 Completed STIS/CCD 8631 (Bright Quasar Close Lensing Search II)

The Space Telescope Imaging Spectrograph (CCD) was used to expand
the Cycle 8 second generation HST snapshot survey of bright quasars,
optimized to find lenses with component image separations < 1". The
observations completed nominally.

1.5 Completed Two Sets of STIS/CCD 8439 (Bias Monitor-Part 2 C8)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at
gain = 4, to build up high-S/N superbiases and track the evolution of hot
columns. The proposal completed with no reported problems.

1.6 Completed Three Sets of STIS/CCD 8437 (Dark Monitor-Part 2 C8)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed nominally.

1.7 Completed Two Sets of WF/PC-2 8699 (The Origin of Short-Period Comets)

The WF/PC-2 was used to detect and characterize cometary nuclei in
order to determine the basic physical properties of a large fraction of the
population of short-period comets. By acquiring statistically significant
data, we can study the origin of this family of comets and test the
hypothesis that they are collisional fragments from the Kuiper Belt
Objects. The observations completed with no reported problems.

1.8 Completed WF/PC-2 8676 (Halo Microlens Source Systems and their
Backgrounds and Reddening)

The WF/PC-2 was used to investigate the existence of dark objects
in the Galactic halo suggested by the MACHO project while is about to
release 5.7 years of LMC data revealing ~ 20 candidate microlensing
events. The observer proposes to obtain medium-deep broadband images of
eight of the new candidate source stars. The observations completed with
no reported anomalies.

1.9 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby
Galaxies - Imaging and Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies. This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies. These data will be placed immediately into the Hubble Data
Archive. The observations were completed as scheduled, and no problems
were reported.

1.10 Completed STIS/CCD 8870 (POMS Test Proposal: STIS Non-Scripted
Parallel Proposal Continuation IV)

The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted, parallel observations as part of a POMS test proposal. The
observations completed with no anomalous activity.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 11
Successful: 10

Per HSTAR 7746, the acquisition at 209/021017Z failed when the scan
step limit was exceeded on FGS-3. Three proposals, all occurring during
the period of the next report were affected: STIS 8700, WF/PC-2 8826, and
STIS 8437.
Scheduled Re-acquisitions: 8
Successful: 8

2.2 FHST Updates:
Scheduled: 18
Successful: 18

2.3 Operations Notes:

The SSR EDAC error counter was cleared three times, using ROP SR-1A.

The battery 4 pressure limit flagged out-of-limits low (with a
value of 918.778) for one telemetry sample at the end of orbit
night. HSTAR 7747 was written.

As directed by ROP NS-12, the STIS flight software error counter
was rest at 209/0255Z, after the acquisition failure detailed in 2.1.

SI C&DH errors were reset at 209/033447Z, per ROP NS-5.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW