SMOV Status & Planning Meeting Notes
7/24/09
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Summary: The anomalous absence of a POSTARG slew inside of a WFC3
observation has been explained. COS FUV alignment and FUV/NUV calibrations are
ongoing. The Tiger Team has recommended the resumption of STIS MAMA Operations via
next week’s SMS.
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Observatory Status
o
o
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PCS

TCS


STScI analysts discovered that an SMS T4 slew (POSTARG) did not execute
as scheduled at 196/12:35. Anomaly is now understood
 Due to the short occultation windows, the T4 (POSTARG slew)
commanding collided with the FGS Maintenance Slew commanding.
 Need to prevent command collisions between T4 and Maint slew
o For the time being, this will be done via manual checking
 The attached chart package Day 196 T4 Anomaly provides details.
Nominal
A STIS MEB1 temperature limit change has been submitted.
o
Safing
 Yesterday’s solar eclipse was handled nominally by HST
o
Other subsystems
 Nominal
SI Status
o
WFC3
 Science
 UVIS plate scale images (from 11444 show the pattern of pointings
is corrupted
o This is the problem of the missing POSTARG
 See PCS report, above
 Other WFC3 calibrations are ongoing
 For details, see the attached WFC3_SMOV_report20090724
o
COS

Science. TKeyes
 COS FUV optical alignment analysis has been proceeding for the
past several days. It appears we will have an update for G140L
 NUV quicklook sensitivity indicates sensitivities are equal or slightly
above the ground (and ETC) values for most gratings, and slightly
below ground for G285M.



o
o
FGS/OTA
 Nominal
o
ACS
o
STIS


ACS SMOV is complete.
Science. CProffitt
 The Tiger Team recommends the resumption of STIS MAMA
Operations via SMS
 No special actions required (protections are adequate)
 Resumption of STIS MAMA operations in SMS208 (next week)
 For more details on status and plans, see the attached
STIS_SMOV_status_24jul2009
NICMOS/NCS
 Forward Plan
 NCS restart
o Project briefing on Mon. July 27
o Restart scheduled for Tues., July 28
P&S Status
o
o
-
ERO 11502 has experience a guidestar failure
 Subsequent visits in this SMS use the same guidestars
 ERO team to evaluate the plan forward
o
o
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ERO

NUV wavecal analysis indicates that stripe B wavelength ranges are
within encoder tolerance of nominal values
o Ranges for stripes A/C differ in some cases
o Evaluation will be made today to determine if we will adjust
any encoder positions prior to observations of next Tuesday.
Visit 50 of program 11474 (external wavecal quicklook) failed GS
Acq on Wed and no science was obtained; visit will be repeated as
visit 70 on 215 or 222 SMS; no change to SMOV timeline is required
More details in the attached COS_SMOV_update_24July2009
Calendar/SMS builds
 SMS208
 PASS processing is in work
 SMS215
 “Hunting and gathering” mode
Replans
 SMS208
 Contains resumption of STIS MAMA operations
Operations
o
o
FOT
 ERO 11502 has experience a guidestar failure
PACOR
 Nominal
o
OPUS (TEllis
 No new OPUS issues to report.
 Tonight data for COS proposal 11469 will be fast-tracked,
 Over the weekend data will be fast-tracked for COS proposal 11484.
 Ops requests will be submitted to get offsets loaded for the "use
offset" genslews scheduled to execute over the next few days for
these proposals.
 OPUS quick-fix 2009.2g was installed Thursday morning
 PRs 62851 and 63053.
 In the near future we also plan to install new versions of CALNICA
 (PR 63077) and MultiDrizzle (PR 63153).
o
Archive
 Nominal