SMOV Status & Planning Meeting Notes
8/04/09
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Summary -- A battery rate-of-charge (ROC) violation occurred on Aug. 3.
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Observatory Status
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A change to
the ROC limit to accommodate the post-SM4 power environment, which now includes NCS,
is recommended. WFC3 SMOV calibrations and analyses are ongoing with nominal early
results. COS wavecals and image acquisition testing are continuing, also with nominal
results so far. The COS ERO may be degraded due to a guidestar acq problem:
investigation is underway. The STIS NUV high-voltage ramp-up failed due to excessive dark
current. An intercept SMS that will effect a higher dark-current threshold for high-voltage
ramping will be produced in order to recover the rest of this week’s NUV operations. The
higher dark current is believed to result from unexpectedly high window glow. The FUV is
operating nominally. The NICMOS NCS restart attempt on Saturday morning succeeded
and the NCS is currently cooling down the NICMOS dewar.
o
EPS (SKrol)
 A battery rate-of-charge (ROC) violation occurred at 215/1230.
 Due large vehicle maneuver and SA slew
o Aggravated by
 Increased load of new/recovered SIs
 NCS operation
 ROC limit-change is under consideration
 For details, see the attached ROC Limit Violation 215-09
o Also contains analysis of increased load due to NCS
operation
 Post-SM4 power analysis is underway
o
All other subsystems nominal
SI Status
o
o
WFC3
 Science (SDuestua)
 Ongoing analyses for
o 11552, Characterization of the WFC3 IR Grisms
o 11447, WFC3 IR Background
o 11426, WFC3 UVIS Contamination Monitor
o Preliminary results all look nominal
o For details, see the attached WFC3_SMOV_03Aug2009

COS
 Science. TKeyes
 NUV/FUV external wavecals and NUV imaging acquisition testing
are ongoing
o All acquisition tests recover target to within nominal 0.1
arcsec uncertainties
o Wavecal analyis results are nominal
 No encoder position adjustments necessary
 For more COS details, see the attached
COS_SMOV_update_4August2009
o
FGS/OTA
 HSTAR 11963 – an initial guidestar acq failure occurred at 215/1635
 2nd acq attempt succeeded
 May have resulted in partial data loss of COS ERO 11508
 COS/ERO team to investigate the science files
o Determine if a repeat is necessary
o
ACS
o
o
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STIS


ACS SMOV is complete.
Science. CProffitt
 Normal NUV HV ramp-up on day 214 failed
o dark current exceeded 15000 c/s during final stages of HV
ramp-up
o This was a suspected risk (mentioned in July 31 Notes)
 Due to apparently larger-than-expected window glow
o For Wednesday’s and next week’s visits an intercept SMS
will be produced
 To reset the ramping limit from 15000 OR counts/s
to 25000 OR counts/s for the NUV MAMA
 Should prevent additional HV ramp up failures and
lost observations
o For more details, see the attached 08-04-09 Snapshot
NICMOS/NCS
 NCS Restart attempt
 Succeeded on Saturday ~ 213/10:00
 NCS is now cooling the NICMOS dewar
o At nominal rate/efficiency
P&S Status
o
Calendar/SMS builds
 SMS222 is built
 Built in continuity with SMS215 Intercept (See replans, below)
 Oversubscription (mentioned in July 31 Notes)
o Dealt with by delaying WFC3 pointing stability check to the
229.
 SMS229 work will start on Thursday
o
Replans
 SMS215 Intercept to allow higher STIS NUV dark-current limit
 Delivered
Operations
o
o
FOT

Nominal
PACOR
 Nominal
 No fastrack activities
o
OPUS (TEllis)
 Processed the two Q/S split COS exposures (la8122eb and labp01e6)
 by having PACOR-A resend the Q part of each exposure as S
versions.
 In the next 24 hours we will be fast-tracking data for COS
 proposals 11474 and 11475
 An Ops request was submitted to document that no offsets will be needed for
the three "use offset" genslews scheduled this week for several COS
proposals.
o
Archive
 Nominal
 Non-discosure agreement signed by 13 of 14 PIs Whose GO proposals
completed by July 31
 Access to their data HAS BEEN enabled
 Information provided by Herb Kennedy