SMOV Status & Planning Meeting Notes
7/02/09
-
Summary: A GO science proposal and a SMOV alignment proposal failed because of
guidestar acquisitions failures during the night. The 486 ACR for MEB Reset is being readied
for implementation today after an ops briefing following this meeting; it will enable the
resumption of COS/ACS MAMA operations next week and STIS MAMA operations the
following week. A secondary mirror move is being proposed prior to SMS201 (July 30) to
achieve confocality and optimum focus for WFC3, ACS, and COS. Yesterday, the ACS was
successfully recovered from Suspend to Operate; ACS SMOV operations will resume next
week.
- Observatory Status
o
PCS/SAC
 Six guidestar reacquisition failures during the night (HSTAR 11909)
 failures were due to a timing problem in the guide star acquisitions in
which the Type 3 (Moving Target) slews were picking up the pointer
before the acquisition has had time to finish.
 The next acquisition also failed
o “search radius exceeded” error
o Because gyro biases could not be updated soon enough
 The reacq at 183/1246 UT succeeded after a realtime OBAD update
o SMOV timeline resumes
o Kudos to the FOT
 Two external observations were affected
o GO science observation using the STIS CCD (GO Proposal
12004)
o SMOV proposal 11434 V1 (WFC3 UVIS Fine Alignment)
 It was agreed during the meeting that this visit will
be copied and added into next week’s SMS187
 For more details, see the attached SMOV-OTA-July-2
 Gyro 5 bias
 Bias plot is being produced
o
EPS

o
o
o
o
TCS


Nominal
Nominal
There was a WFC3 thermal-model discussion yesterday
 To address modeling of WFC3 TEC powe/thermal control
 Analysis is ongoing
I&C

Nominal
DMS

Nominal
486FSW
 Nominal
-
o
SAFING
 Nominal
o
SIC&DH & P/L FSW
 Status
 Nominal B-side operation continues
 Forward Plan
 486 ACR for MEB Reset implementation
o FRR and uplink planned for later today
SI Status
o
WFC3
 Engineering
 Status
o Operate
 Forward Plan
o UVIS Dark, Read Noise, CTE 183/15:29 UTC
o IR Dark, Read Noise, Background 183/17:23 UTC
o UVIS Bowtie test continues 183/19:30 UTC
o IR Fine Alignment (11435, Visit 1) scheduled for 183/23:55
UTC
 OR 18578-0 submitted to adjust the IR corrector
prior to IR Fine Alignment Visit 1 (11435)
 IR corrector inner cylinder: 5 steps (from resolver
53119 to 53422)
 No focus or outer cylinder change is required at this
time
o UVIS Internal Flats 184/03:13 UTC

o
COS


o
Science: JMackenty
 UVIS Bowtie Monitor
o Continues to look nominal
o For more details, see the attached WFC3 SMOV
July2.summary
Engineering
 Status
o Operate / FUV Operate
 Forward Plan
o Patchable constant update (Visit 2R) scheduled for
184/13:15 UTC
o NUV Alignment and Focus Part 3 (Visit 3R) begins
184/14:18 UTC
Science. TKeyes
 We have prepared our desired (V2,V3) use-offsets (for genslews) to
be used in the four COS NUV visits on Friday.
o GHartig submitted them to Tracy on Wed afternoon.
o Will forward the info directly to GSFC separately today.
FGS/OTA
 FGS
 See PCS report, above

o
ACS

OTA

Engineering
 Status
o Operate / WFHROp
o ORs 18575-2 for the recovery/on-orbit test was successfully
executed at 182/18:54 UTC


o
STIS

o
-
Forward Plan
o SMOV activities to resume on SMS187 (next week)
Science. LSmith
 Nothing to report
Engineering
 Status
o Operate/CCD On
o MAMAs 1&2 LV Off


Matt Lallo presented the latest analysis of OTA focus measurements
o Proposed the following forward plan
 WFC3 & COS fine alignment/focus procedures, to
complete next week, should offset for confocality
with ACS WFC
 Small Secondary Mirror move just prior to SMS201
optimize focus (with small overshoot) for all three SIs
o For details, see the attached FocusEstimateSlide
Forward Plan
o CCD Dark & Bias Monitoring continues 183/12:41 – 14:28
UTC
o Anneal 183/18:57 UTC until 184/06:57 UTC
o Next Anneal 184/10:58 UTC
Science. CProffitt
 STIS CCD SMOV is complete (other than intenals)
o GO observations later today
 MAMA science will be enabled in the SMS194 (June 13)
NICMOS/NCS
 Status
 ESM in Operate, PCE Enabled
 NCS CPL in Standby at -34 degC
 TPS ~6.5e-7 torr
 Forward Plan
o NCS recovery being examined for the coming weeks
 Ops Briefing likely on 9 July
 CPL Restart ~13 July
 NCC restart ~14 July
P&S Status
-
o
Calendar/SMS builds
o
Replans
 SMS187
 Needs to be done with additional reacqs
o Will include repeat of WFC3 UVIS fine alignment visit that
was lost last night to the failed FGS acquisitions
 ACS SMOV is included
o On the assumption that 486 ACR is implemented
o WFC starts early in the week, SBC later
 SMS194
 Work is just starting
o “gathering visits”
Operations
o
o
o
o
FOT


ACS transitioned to Operate
Gyro biases updated
PACOR
 Nominal
 Routine data processing
OPUS
 Nominal. No OPUS issues to report.
 Fast-track data coming today and overnight for
 WFC3 proposals 11434 and 11435.
 Received offsets from George Hartig for the 5 genslews scheduled on Friday
 COS proposals 11468 and 11469
 Will submit OPS requests for each of these today.
Archive
 Nominal