HUBBLE SPACE
TELESCOPE - Continuing to collect World Class Science
DAILY REPORT #4862
PERIOD COVERED: 5am June 8 - 5am June 9, 2009 (DOY 159/0900z-160/0900z)
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.
COS23/FUV/S/C 11356
COS FUV Initial On-Orbit Turn-On
This proposal specifies the procedure for SMOV initial HV turn-on and
ramp-up of the COS FUV detector. (The FUV will have been commanded to
its Operate state to support execution of proposal 11353.) The procedure
is detailed in the Observing Description, but in summary, the following
is done: The initial transition from FUV Operate to HVLow is broken into
two parts, with a gap of 4 hours between turning on the HV and ramping
to the HVLow (SAA) voltage. This will be followed by 5 cycles of HV
ramp-up and return to HVLow. Cycles will ramp up to successively higher
(magnitude) voltage, with the fifth cycle going to the nominal operating
values. There will be a gap of at least 4 hours between cycles. All HV
ramp-up will be done at 10 sec per HV "step". The step rate and cycle
voltage values (for Segments A and B) must be patched in FSW in each
cycle prior to the HV ramp commanding. Memory monitors will be set on
the patched memory locations. Immediately after any HV commanding, and 4
hours after ramp-up commanding, the DCE memory will be dumped.
Immediately after HV ramp-up commanding higher than HVLow, short DARK &
WAVE exposures will be obtained. Visits 01 and 02, and all the
subsequent even numbered visits (the ones 4 hours after HV ramp-ups),
end with NSSC-1 COS event flag 3 being set. If the flag remains set,
subsequent FUV commanding will be skipped. Thus, Operations Requests
must be in place to clear the flag prior to those subsequent visits.
Real-time monitoring of the telemetry will be used to guide the
decisions whether or not to clear the flag. The final visit (13)
provides a scheduled final opportunity to clear flag 3, and if the flag
is cleared, initiates nominal FUV HV commanding and requests a DARK
exposure.
FGS/S/C 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/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
WFC3/S/C 11454
Activation Test
This program (WFC3 SMOV program WFC3-01) verifies that WFC3 is in the
same condition after release from the Shuttle as during the Functional
Test (FT), which was conducted with HST in the Shuttle’s payload bay.
This analog test will be implemented in stored commanding that will be
generated from a Phase II proposal, whereas the in-bay FT was run with
real-time CCLs.
The purpose of the FT was to demonstrate that WFC3 is viable for
scientific research. This was accomplished by demonstrating that WFC3
can be commanded to the nominal scientific operating state and can carry
out nominal scientific operations of the UVIS and IR channels, including
operation of the thermoelectric coolers (TECs), corrector and focus
mechanisms, UVIS shutter, SOFA and FSM filter wheels, detectors, and
Control Section (CS). Only one Side of the CS is verified.
This test is compatible with execution during the post-FT, Safe-Protect
period. Operability of the TECs is not demonstrated in this test, but is
demonstrated in the SMOV Detector & TEC activation programs, WFC3-04 and
WFC3-05.
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:
18498-0 - Clear COS Event Flag 3 after FUV initial turn on Part 3-1 completes
@
159/1341z
18476-0 - WFC3 Transition Heaters From Protect to
COMPLETED OPS NOTES: (None)
SCHEDULED
SUCCESSFUL
FGS GSAcq
6
6
FGS REAcq
4
4
OBAD with Maneuver 3
3
SIGNIFICANT EVENTS:
Flash Reports:
-At 159/1819 WFC3 was successfully transition from Protect Operate to Operate.
-At 159/19:38z COS FUV HV was partially ramped to HVNom -5010/-4963V volts) on
both
segment A and B respectively.