HUBBLE SPACE TELESCOPE - Continuing to collect World Class
Science
DAILY REPORT #4863
PERIOD COVERED: 5am June 9 - 5am June 10, 2009 (DOY
160/0900z-161/0900z)
OBSERVATIONS SCHEDULED
ACS/WFC/S/C 11811
ACS CEB-R Optimization Iteration 3
During the early weeks of SMOV the ACS-R team will work to
find the best
parameters for CEB-R and the WFC CCD operations before
continuing with
the normal SMOV activities and eventually enable science
operations.
This optimization needs to be done in an iteratively way.
The plan is to
have up to eight iterations spread out through SMOV week
2-4. A core-set
of observations aimed to assess the performance of the
CCDs and to check
the relative phasing between the internal ASIC signal and
the incoming
video signal will be repeated in all iterations. In any
given iteration
a specific test will be run to determine the best value
for a given
parameter. Data collected in each iteration will be
quickly analyzed and
if needed, new parameters will be uploaded in real time
before the
following iteration. The data will consist of a mix of
normal data
(bias, flat, EPER, darks) and O-mode data. In order to
facilitate the
program implementation, data collection and reduction, the
program will
be implemented in eight different proposals. 11811 covers
the third
iteration.
COS05/NUV 11466
NUV Detector Dark
Measure the NUV detector dark rate by taking long science
exposures with
no light on the detector. The detector dark rate and
spatial
distribution of counts will be compared to pre-launch data
in order to
verify the nominal operation of the detector, and for use
in the CalCOS
calibration pipeline. Variations of count rate as a
function of orbital
position will be analyzed to find dependence of dark rate
on proximity
to the SAA.
FGS 11458
Optimizing FGS2R2 Performance with the AMA
This proposal satisfies SMOV4 AD OTA/FGSS-054. S-curves
with PUPIL and
F583W will be obtained at selected locations within the
FGS2R2 FOV
during SMOV4. These data will be will be used to adjust
the AMA so as to
align the HST pupil onto the interferometer's Koesters
prisms. The final
AMA position will be set to produce an acceptable set of
S-curves across
the FGS2R2 FOV. The AMA will be adjusted using
CCL/instructions from the
ground. It is intended that this proposal executes during
the SMOV4 BEA
and will require several (on the order of 4) iterations to
achieve
optimal interferometric performance.
STIS07/CCD 11404
CCD Dark and Bias Monitor for SMOV4/Cycle 17 Activity STIS-07
Monitor the darks for the STIS CCD. 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.
STIS18/MA2/S/C 11351
NUV MAMA HV Recovery
This proposal addresses the concerns over Cesium migration
from the
NUV-MAMA photocathode into the pores of the microchannel
plate and lays
out the procedures necessary to permit a safe and
controlled recovery of
the NUV-MAMA detector to science. This procedure should
only be used
during the SMOV4 high voltage recommissioning phase for
the NUV-MAMA.
After, the normal ramping procedure should be used. This
proposal is
loosely based on proposal 10036, STIS MAMA Anomalous
Recovery, with the
differences summarized below: (1) additional plateaus
during voltage
commanding, (2) longer dwells after each 50 V step, (3)
intermediate
ramp re-structured into 2 parts, (4) change in yellow and
red limits and
the MCP Hi limit, setting new values for the next plateau,
and (5)
adding a fold test at 300V below the nominal MCP voltage.
The recovery
consists of four separate procedures (visits) and they
must be completed
successfully and in order. They are: (1) a signal
processing electronics
check, (2) 1st high voltage ramp-up to an intermediate MCP
voltage of
-1500 V with limits modifications and voltage plateaus,
(3) 2nd high
voltage ramp-up to an intermediate MCP voltage of -1750 V
(300 V below
the nominal MCP voltage) with limits modifications and
voltage plateaus
followed by a fold distribution test, and (4) a final high
voltage
ramp-up to the full operating voltage, again with limits
modifications
and voltage plateaus, followed by a fold distribution
test. During the
1st high voltage ramp-up, diagnostics are performed
followed by a dark
exposure. During the 2nd and 3rd high voltage ramp-ups,
diagnostics are
performed followed by a dark, flat field ACCUMs, and a
fold analysis
test. All required parameters are defined in 07-248 FUV
and NUV SMOV
Ramp-up Parameters Excel workbook. Supports Activity
STIS-18
STIS19/MA1 11390
STIS-19 FUV MAMA Dark Measure
The STIS MAMA HV power supplies are turned on only during
each day’s
block of SAA-free orbits. The FUV MAMA dark current glow
has been
determined to increase with the length of time the FUV HV
power supply
has been on. The rate of this daily increase has changed
over the years
and also appears to be sensitive to temperature. To
measure the rate at
which the dark current increases, as soon as possible
after the
completion of STIS-17 (11350) completes a series of five
1380s FUV MAMA
dark exposures spread over 5 or more orbits of a single
SAA period will
be taken. A second block of five exposures should be done
near the end
of the SMOV period when the temperature of the aft shroud
and STIS are
in the range expected for normal Cycle 17 operations.
FLIGHT OPERATIONS SUMMARY:
Significant Spacecraft Anomalies: (The following are
preliminary reports
of potential non-nominal performance that will be
investigated.)
HSTARS: (None)
COMPLETED OPS REQUEST:
18502-0 - Clear COS Event Flag 3 after FUV initial turn on
Part 3-2 completes @ 160/1334z
18499-2 - Reconfigure to Avoid AD Closure Each Safemode @
160/1358z
18503-0 - Clear STIS Event Flag 3 (MAMA2 Checkout Part 2)
@ 160/1510z
COMPLETED OPS NOTES:
1847-2 - Update COS FUV DCE HV Nom preset limits @
160/1319z
SCHEDULED
SUCCESSFUL
FGS GSAcq
5
5
FGS
REAcq 4
4
OBAD with Maneuver
4
4
SIGNIFICANT EVENTS:
Flash Report:
At GMT 160/13:05 the 486 and PSEA were reset to their
nominal configuration
to only command the aperture door closed for specific
safemode event.