Daily Report #4859

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
a (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.