SMOV Status & Planning Meeting Notes
7/09/09
-
Summary: STIS suspended again during attempted MIE Checkout and Recovery.
Analysis is underway and plans for recovery in time for next week’s STIS activities are being
discussed. WFC3 IR alignment/focus is nearing completion with good results. The UVIS
alignment mechanism is showing some non-linearity (or settling); the need for any further
adjustment is under discussion. COS target acq modes have been determined to be working
correctly, but the aperture mechanism commanding used in the NUV alignment activity needs
to be modified to properly carry out relative motion steps. An intercept SMS is being
prepared to accommodate both the need for a realtime STIS recovery and the opportunity to
repeat the COS visits with updated aperture mechanism commanding. ACS
functional/internals are progressing well, but part of the external CTE Monitor was lost to a
guidestar reacq failure during the night. Plans for restart of the NICMOS Cooling System will
be discussed at an ops briefing today.
- Observatory Status
o
PCS/SAC
 Nominal
o
EPS

o
o
o
-
TCS

I&C

DMS

Nominal
Nominal
Nominal
Nominal
o
486FSW
 Nominal
o
SAFING
 Nominal
o
SIC&DH & P/L FSW
 Status
 Nominal B-side operation continues
 Forward Plan
 Nothing to report
SI Status
o
WFC3
 Engineering
 Status
o Proceeding with UVIS/IR alignments and detector internals

Science: JMackenty




o
COS


IR alignment/focus
o Repeat of Visit 1 focus sweep occurs today
 Expect confirmation of successful alignment
UVIS alignment
o Focus moves showed some settling/non-repeatability
o Focus is established (at 2.5micron offset) with some
uncertainty
 Analysis ongoing
 Need to decide if currently achieved focus is OK or
additional work is required (timescale is 2+ weeks)
Mechanisms and detector internals
o Analyses ongoing
 Some evidence of some filter-wheel shift
For more details on all the above, see the attached
WFC3_SMOV_Science_9July
Engineering
 Status
o Operate / FUV Operate / NUV HVSAA
o NUV Alignment and Focus Part 6 (Visit 6R) occurred at
189/15:51 UTC
o NUV Alignment and Focus Part 7 (Visit 7R) occurred at
189/17:12 UTC
o Some issues with aperture mechanism movement (See
below)
Science. TKeyes
 NUV Optical Alignment (COS09, 11469)
o Visit 5
 Nominal
 GENSLEW and aper mech inputs have
been generated
o Visit 7
 Anomalous aperture mechanism behavior
 Not moving the commanded number of
steps (indicated by LVDT)
 Need to look at SMGT to see if this
procedure was tested and how it worked
 Visit may need to be repeated
o No harm in letting next week’s visits
(2) occur
 But will need to be repeated
 Note: Post-meeting, the cause of the anomalous
behavior was traced to exposure routines that
command the aperture mech to home, thereby
undoing the relative moves commanded just prior to
the start of the exposure routine. It was quickly
determined that the exposure routines could be
modified to avoid the home commands, and used in
the next SMS (See Planning & Scheduling, below) –
cpb
o
Target acq modes (Acq/image, acq/search, acq/peakxd)

o
Analysis has determined that all three modes are
functioning properly
 Only acq/peakd not yet tested
For more details, see the attached COS report 08Jul09
o
FGS/OTA
 A guidestar reacquisition failed at 190/08:35:52Z (HSTAR 11923)
 Affected last two exposures of ACS External CTE Monitor (11510)
 Secondary Mirror Move
 Plans for a 3-micron move around day 201 (July 20)
o presented at a dedicated meeting yesterday, July 8
 plans were agreed to
o For rationale and description, see the attached
MirrorMove2009 ML 08JUL09
 ACS Image Quality and PSF Check (11379)
 Executed last evening
 SIAF (aperture location) process has started, on the basis of this
data
o
ACS


o
STIS

Engineering
 Status
o Operate / WFHROper
Science. LSmith
 ACS External CTE Monitor (11510)
o Data loss due to gs reacq failure (FGS/OTA, above) being
evaluated
 Visit may need to be repeated, but is not driving any
downstream SMOV
Engineering
 Status
o Suspend
o Flash Report:
 STIS Suspended During Attempted MIE Checkout
and Recovery (S. Arslanian, 07/09/09, 3:10am)
 During Ops. Request 18599 to verify the
functionality of the STIS MIE and recover STIS to
Operate mode, STIS Suspended due to a STIS STB
100 “Invalid CS FSW Mode for more than 10 minor
frames”.
 This occurred after STIS was transitioned from
Suspend to Operate and initial polling of the MIE
Status.
 Error was reported during attempted transfer of MIE
RAM Memory to STIS CS Buffer RAM using macro
OMIE2RAM.
 STIS CS Memory was then dump via Ops. Request
18608.
 Payload FSW and SISE will start investigation in the
morning.

Forward Plan
o
o

o
Forward Plan
 NCS Recovery
o Ops briefing today at 11 am.
P&S Status
o
Calendar/SMS builds

o
-
Science. CProffitt
 Nothing further to report
NICMOS/NCS
 Status
 ESM in Operate, PCE Enabled

-
Discussion on how to recover STIS in time to proceed with
activities in next week’s SMS
See Planning & Scheduling, below
SMS201
 Work continues
 General approach is to schedule
o COS FUV alignment, focus and wavecal activities
o COS NUV schedule drivers
o WFC3 EROs
Replans
 SMS187 Intercept
 Decision to produce an intercept SMS187
o STIS internals Fri-Sun removed
 Provides opportunity for realtime recovery
 Any time prior to ~ 1300 UT on Monday
morning
o COS NUV Optical Alignment repeats (COS09, 11469)
 Commanding updated to produce correct aperture
mech moves (from COS science note, above)
 Visit 7 (renamed Visit 97)
 Visit 9
 Visit 99 (on Monday in SMS194)
Operations
o
FOT

Nominal
o
PACOR
 From July 8 (8am) to July 9 (8am), Pacor-A received eight events with fasttrack observations.
 The data was processed and delivered to OPUS without any
problems.
o
OPUS
 We processed the 3 STIS memory dumps that errored in generic conversion





o
by manually populating the OHSTTIME keyword in dvx files.
We received 3 more of these this morning, with the same error,
o the same workaround will be used for them.
Wednesday morning, we found that 4 ACS datasets from proposal 11369
errored
 due to missing dark reference files.
 The uncalibrated files for these were FTPed to the ACS team.
Overnight 2 COS exposures for fast-track proposal 11469 failed during
housekeeping database table updates
 but the files were fast-tracked and archived.
We have fast-track data coming for WFC3 proposal 11435 in the next 24
hours.
Archive
 Nominal