HUBBLE SPACE TELESCOPE - Continuing to collect World Class
Science
DAILY REPORT #4859
PERIOD COVERED: 5am June 3 - 5am June 4, 2009 (DOY
154/0900z-155/0900z)
OBSERVATIONS SCHEDULED
ACS/WFC/S/C 11810
ACS CEB-R Optimization Iteration 2
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. 11810 covers
the second
iteration.
COS/NUV/S/C 11355
COS NUV Initial On-Orbit Turn-On and Recovery after
Anomalous Shutdown
This proposal is designed for the initial turn-on of the
COS NUV MAMA
detector. The same procedure may later be used to recover
the detector
after an anomalous shutdown. Anomalous shutdowns can occur
as a result
of bright object violations which trigger the Bright Scene
Detection or
Software Global Monitor. Anomalous shutdowns can also
occur as a result
of MAMA hardware problems. The Initial MAMA turn-on
consists of three
tests: a signal processing electronics check; a slow high
voltage
ramp-up to an intermediate voltage; and a slow high
voltage ramp-up to
the full operating voltage. During each of the two high
voltage
ramp-ups, diagnostics are performed during a dark time-tag
exposure. The
turn-on is followed by a MAMA Fold Analysis Test. The
complete sequence
is contained in visits 1 through 4. If a second execution
is required
during cycle 17, visits 5 through 8 will be run and
another proposal
prepared for possible future occurrences.
Supports Activities COS-04 and COS-07
FGS/S/C 11458
Optimizing FGS2R2 Performance with the AMA
Ths 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.
STIS06/CC 11382
STIS SMOV4 CCD Functional
This proposal corresponds to the SMOV4 activity summary,
STIS06.
This purpose of this activity is to measure the baseline
performance and
commandability of the CCD subsystem.
This test assesses several CCD functions and performance
characteristics, including: bias levels, read noise, dark
current, CTE,
and gain. Bias, dark, and flat field exposures are
executed to achieve
these goals. Full frame and binned (2 x 1, 1 x 2, and 2 x
2)
observations are made. Biases are taken at gain=1 and
read-out in
subarray mode to support target acquisition and peakup
modes.
Only the primary amplifier (Amp D) is used. Dark exposures
are made
outside the SAA (as is standard). All exposures are
internals
STIS07/CC 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.
STIS08 11383
STIS SMOV4 Aperture Wheel and Lamp Functional Tests
(activity STIS08)
This SMOV4 Phase2 proposal corresponds to SMOV4 activity
summary,
STIS-08.
This is activity has five functions: verification of the
aperture
positions, verification of absolute optical position,
verification of
slit wheel repeatability, verification of lamp
functionality, and
verification of CCD imaging mode functionality.
STIS09/CC 11384
STIS-09 STIS to FGS Alignment
This visit will measure the alignment between the STIS
instrument CCD
and the HST FGSs by taking dithered STIS 50CCD images of a
star with
highly accurate astrometric positions (UCAC-2, or Tycho,
or Hipparcos or
better) to determine STIS CCD to FGS offset and rotation
angle. The
guide stars used should have astrometric accuracy
comparable to that of
the target. Interleaving external images and lamp images
of a reference
slit will ensure that external target is properly
registered with
respect to the STIS aperture plane. This test is intended
to be
conducted during the BEA (bright earth avoidance) period,
so sufficient
targets and contingency visits are defined to ensure that
there are
always available targets in both the northern and southern
BEA zones
during the SMOV period.
STIS10 11385
STIS-10 CCD Optical Format Verification
This proposal will take a lamp spectrum at a single
CENWAVE setting of
each of the CCD spectroscopic optical elements, G230LB,
G230MB, G430L,
G430M, G750L, and G750M. The exposures here are repeats of
selected
exposures that were taken in June 2001 as part of the
Cycle 11 CAL/STIS
program 9617. The location of each spectrum on the
detector will be
compared with the pre-repair observations, to look for
operationally
signficant shifts. The observed line-widths will also be
compared with
the previous observations to look for any changes in
spectral
resolution.
STIS14/CC 11400
STIS CCD CTI Check: STIS Activity Number STIS-14
For CCD detectors, the transfer of charge from one pixel
to the next is
not perfect. Charge Transfer Inefficiency (CTI)
measurements quantify
the fraction of charge left behind after this charge
transfer. The
further the charge needs to be shifted before the
read-out, the more
charge it will lose. Therefore, CTI measurements are
necessary and can
be determined through the "internal sparse field
test". CTI measurements
are made along the parallel axis and used in conjunction
with the
following optional parameter POS which allows the
off-center positioning
of the MSM for some slits. This activity is the first in a
series of
measurements that will be made to characterize the
dependence of the CCD
CTI as a function of signal level, source position, and
time. The
remaining measurements will be conducted as part of the
Cycle 17
calibration program to fully characterize the CTI. This
activity,
executed during the SMOV4 period, will enable measurement
of the
magnitude of the CTI for a limited parameter set and will
provide a
comparison of the current CTI performance with the CTI
performance prior
to the Side-2 failure. All exposures are internals.
STIS17/MA/S/C 11350
FUV MAMA HV Recovery
This proposal addresses the concerns over Cesium migration
from the
FUV-MAMA photocathode into the pores of the microchannel
plate and lays
out the procedures necessary to permit a safe and
controlled recovery of
the FUV-MAMA detector to science. This procedure should
only be used
during the SMOV4 high voltage recommissioning phase for
the FUV-MAMA.
After that, the normal ramping procedure should be used.
This proposal
is loosly 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 and unique 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 -1950 V (300 V below the nominal MCP voltage)
with limits
modifications and voltage plateaus followed by a fold
distribution test,
and (4) the 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-17
STIS5/CC 11399
STIS CCD Hot Pixel Annealing (SMOV4 activity STIS-05)
This purpose of this activity is to repair radiation
induced hot pixel
damage to the STIS CCD by warming the CCD to the ambient
instrument
temperature and annealing radiation damaged pixels.
Radiation damage creates hot pixels in the STIS CCD
Detector. Many of
these hot pixels can be repaired by warming the CCD from
its normal
operating temperature near -83 deg C to the ambient
instrument temperature
(~ +5 deg C) for several hours. The number of hot pixels
repaired is a
function of annealing temperature. So although the CCD
during Safing has
been warmer (~ -5 deg C) than its normal operating
temperature, the
electronics have been off and the CCD has remained cooler
than its
temperature (+5 deg C) during the annealing procedure.
The effectiveness of the CCD hot pixel annealing process
is assessed by
measuring the dark current behavior before and after
annealing and by
searching for any window contamination effects. In
addition CTE
performance is examined by looking for traps in a low
signal level flat.
This proposal is a continuation of the Cycle 12 proposal
10022.
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: (None)
COMPLETED OPS NOTES: (None)
SCHEDULED
SUCCESSFUL
FGS GSAcq
9
9
FGS REAcq
0
0
OBAD with Maneuver
6
6
SIGNIFICANT EVENTS:
Flash Report:
Part 3 of the COS NUV init turn-on was completed today at
154 19:00:10.