HUBBLE SPACE TELESCOPE - Continuing to collect World Class
Science
DAILY REPORT #4864
PERIOD COVERED: 5am June 10 - 5am June11, 2009 (DOY
161/0900z-162/0900z)
OBSERVATIONS SCHEDULED
ACS/WFC 11510
External CTE Monitor
Observations of 47 Tuc with half-FOV sized dithers to
check the impact
of CTE on photometry after SM4.
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 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.
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.
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:
18504-0 - Clear STIS Event Flag 3 (MAMA2 Checkout Part 3)
@ 161/1444z
18477-0 - WFC3 Enable UVIS TEC Commanding @ 161/1855z
18478-1 - WFC3 Enable 6-Stage TEC to -90C @ 161/1859z
18479-1 - WFC3 Enable TECFIRE @ 162/0243
COMPLETED OPS NOTES: (None)
SCHEDULED
SUCCESSFUL
FGS
GSAcq
4
4
FGS
REAcq
4
4
OBAD with Maneuver
4
4
SIGNIFICANT EVENTS:
Flash Report:
The COS FUV HV was partially ramped to HVNom (-5105/-5057V
volts) on both
segment A and B respectively at 161/19:24z.