Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/ftp/observing/status_reports/old_reports_00/hst_status_12_01_00 Дата изменения: Fri Dec 1 15:02:01 2000 Дата индексирования: Sun Dec 23 10:18:06 2007 Кодировка: Поисковые слова: comet

HUBBLE SPACE TELESCOPE

DAILY REPORT #2760

PERIOD COVERED: 0000Z (UTC) 11/30/00 - 0000Z (UTC) 12/01/00

Daily Status Report as of 336/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

1.1 Completed Three 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 STIS/CCD 8661 (UV Spectroscopy of the Giant Planet
Atmospheres)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
the atmosphere of Uranus in the ~1600-3100 Angstrom spectral
region. Later, the remaining giant planets, Jupiter, Saturn, and Neptune
will be observed. Analyses of these observations will be used to determine
the abundance and altitude profiles of gaseous absorbers and aerosols from
the millibar region to hundreds of millibars. The proposal completed with
no reported problems.

1.3 Completed Three Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)

The Space Telescope Imaging Spectrograph (CCD) was used to monitor
the darks. The proposal completed with no reported problems.

1.4 Completed WF/PC-2 8683 (Imaging Of Brightest Cluster Galaxies: The
High End Of The Black Hole Mass Distribution)

The WF/PC-2 was used to make kinematic black hole detections in
galaxies to decide whether they indicate that the mass correlates with both
optical luminosity and radio power. The observation completed with no
reported problems.

1.5 Completed STIS/CCD 8562 (Probing the Large Scale Structure: Cosmic
Shear Observations)

The Space Telescope Imaging Spectrograph (CCD) was used to probe
the distortion of light bundles from distant galaxies, looking at the
statistical properties of the intervening inhomogeneous {dark} matter
distribution. The proposal completed nominally.

1.6 Completed WF/PC-2 8389 (Illuminating the Galactic Dark Matter)

The WF/PC-2 was used to re-image the HDF in F606W in order to
confirm and better determine the proper motions of four MACHO candidates
discovered from the comparison of the original December 1995 HDF frames
with WFPC2 F814W frames exposed in December 1997. The observations
completed with no reported problems.

1.7 Completed Four Sets of STIS/CCD 8260 (Searching for the Hydrogen
Reionization Edge of the Universe at 5HST)

The Space Telescope Imaging Spectrograph (CCD) was used to observe
one of 36 parallel orbits {4--5 fields of 5--8 orbits each} to constrain
the H Lyman-edge in emission that marks the transition from a neutral to a
fully ionized IGM at a predicted zion~eq5--15. This edge is due to
recombination from the H Lyman series and Lyman continuum, and can be used
to constrain zion, one of the most important unknown quantities in large
scale structure and cosmology. The proposal completed nominally.

1.8 Completed STIS/CCD 8838 (Bias Monitor - Part 1)

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 nominally.

1.9 Completed Five 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. As described in HSTAR 7982 and 2.1, the acquisition for the final
iteration of this proposal failed, all observations were lost. Otherwise,
the observations completed with other no reported problems.

1.10 Completed Two Sets of STIS/MA2 8843 (Cycle 9 MAMA Dark Measurements)

The Space Telescope Imaging Spectrograph (MA2) was used to perform
the routine monitoring of the MAMA detector dark noise. The proposal
completed nominally.

2.0 FLIGHT OPERATIONS SUMMARY:

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

Per HSTAR 7982, the acquisition at 335/214034Z failed when the
search radius limit was exceeded for FGS-2. A following map showed errors
of 6.747, -2.719, and -7.079. The proposal detailed in 1.9 was affected.
Scheduled Re-acquisitions: 4
Successful: 4

2.2 FHST Updates:
Scheduled: 21
Successful: 21

2.3 Operations Notes:

HST operations was conducted from the Science Institute as GSFC
Internal Simulation #2 (EVA-1) was conducted for much of the day from the
GSFC STOCC.

Using ROP SR-1A, the SSR EDAC error counter was cleared four times.

HSTAR 7981 documents that at 335/022153Z the coarse sun sensor #1
temperature (GCSS1T) flagged our-of-limits low (-45.0897) for one telemetry
sample.

The engineering status buffer limits were adjusted at 335/2153Z,
per ROP DF-18A.

SSA transmitter #2 was turned on at 336/0435Z and turned off at
336/0445Z with ROP IC-2.

CCS string "B" (v3.3) was configured for prime operations at
336/0303Z. When there was a core data server problem, CCS string "A"
(v3.2) was configured for prime operations. Later, at 336/0400Z, CCS
string "B" was configured for prime operations.

The STIS MCE-1 reset at 336/080327Z while the low voltage was on
and while inside an SAA interval. The STIS flight software error counter
was reset at 336/0907Z as directed by ROP NS-12. MAMA-1 will be recovered
at 336/1342Z via normal SMS commanding.

After analysis, the on-board automatic gyro bias computations were
enabled at 336/1137Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/CAW