SMOV Status & Planning Meeting Notes
6/11/09
Notes provided by Burley (richard.j.burley@nasa.gov), Biagetti (biagetti@stsci.edu, and others as
indicated.
- Summary
Spacecraft subsystems continue to operate nominally. Configuration of the
WFC3 TECs in preparation for detector cooldown has occurred. The COS FUV high-voltage
ramp-up continues according to plan. The first COS NUV external observation (COS “first
light”) has completed; awaiting receipt of science data to confirm. The STIS NUV MAMA
recovery continues.
- Observatory Status
o
PCS/SAC: JWirzburger
 Nominal
 Gyro Configuration Meeting today at 11:00, and forward plan.
o
EPS

o
TCS: JAbel
 Nominal
 STIS MEB1 status report TBD
I&C
 Nominal
o
o
DMS

o
486FSW
 Nominal
o
SAFING
 Nominal
SIC&DH & P/L FSW
 Nominal
o
-
Nominal
Nominal
SI Status
o
WFC3
 Engineering
• Status: Operate
o OR 18477-0 successfully completed 161/19:05 UTC to clear
WFC3 event flag 8 to enable UVIS TEC commanding to
occur from the SMS
o OR 18478-1 successfully completed 161/19:06 UTC to
enable IR 6-stage TEC with a setpoint of -90C
o OR 18479-1 successfully completed 162/02:43 UTC to
enable TECFIRE with nominal setpoints
• Forward Plan
o

o
COS

Continue cooling detectors
 SMS commanding to continue TEC cooldowns
scheduled to begin 162/17:00 UTC
 OR 18480-0 submitted to re-enable IR 6-stage
commanding to continue cooldown to -128 degC
Science: SDeustua
• From JMackenty email of last night:
o Pleased to report that we have completed the second (of
three) stages in cooling down WFC3.
o On monday, the optical bench was cooled to ~0C without
incident (no oscillations were observed).
o Wednesday afternoon and evening, the IR 6-stage TEC was
cooled to -90C
o then the TECFIRE was cooled to -53 on the IR detector
housing baseplate and -45C for the IR cold enclosure.
 All occurred nominally and good margins appear to
exist for the radiator temps.
o We plan to proceed with the remaining cooldown Thursday
afternoon starting at 1pm.
 This will first take the UVIS CCD to -83C and then
the IR detector to -128C.
Engineering. SSwain.
• Status
o Operate, FUV Operate/HVLow
o Vacuum gauge ~2.9e-6 torr
o FUV initial HV turn-on visits 7/8 (Part 3-3) completed and
returned to HVLow at 161/23:40 UTC
 FUV ramped to HVNom -5105/-5057 V on segments
A and B
 5-min tame-tagged dark and 250-sec PtNe G160M
 DCE memory dumped
o COS-to-FGS Alignment part 1 completed 162/11:57 UTC
(First external)
o HSTAR 11874
 At 162/09:49:19 we received STB message COS
1035 (TA Global Threshold not exceeded). While
Preparing to calculate a flux weighted centroid to
determine the location of a target (after a sky scan),
a target acquisition macro determined that there are
not enough total counts to compute a meaningful
flux weighted centroid. The target acquisition failed,
but a null image was created.
 Flash Report (from JBacinski) COS FUV partial ramp to HVNom (part 33);
• The FUV HV was partially ramped to HVNom (-5105/-5057V volts)
on both segment A and B respectively today @09.161:19:24, the
DCE memory was dumped immediately after the ramp and was
dump again at @009.161:23:39. All voltages, currents and
temperatures were as expected. The detector was ramped back to
HVLow @09.161:23:40
• A 5 min time-tag dark and 250 second PtNe#1 lamp, G160M
exposures were executed. Plots are attached of the HV and current
•
•
•
•

o
monitors as well as detector counter telemetry during the ramp and
exposures
The FUV detector is scheduled to be ramped to a 4th iteration of its
HVNom state Friday @09.163:17:25, it will be ramped to -5199/5152V on segment A and B respectively. Ops request 18507 has
been written to clear COS event flag 3 to allow Friday’s FUV HV
commanding to proceed as planned.
Chuck Harguth generated a plot comparing the count rates at the
different HVNom voltages setting collected over the last several days
during the 250 second PtNe#1 lamp exposures, no noticeable
difference in the count rates was observed (see attached).
See attached
o FUV Ramps 1 - 3_combine_dig_evt_cnts
o fuv_counters_pt3-3_PLOT
o fuv_hv_current_mon_pt3-3_PLOT
o fuv_hv_mons-pt3-3_PLOT
Forward Plan
o FUV initial HV turn-on visits 9/10 (Part 3-4) scheduled
163/17:25 UTC
 OR 18507-0 submitted to clear COS event flag 3 to
allow FUV commanding to proceed
Science. TKeyes
• The data collected during the latest FUV detector HV ramp step
was nominal;
o All diagnostics remain nominal on both segments
o Background rates consistent with previous visits.
o Wavecal spectra normal: position of spectra fell directly on
top of one of previous visits.
o Recommend ops request to clear event flag 3, continue with
next step in FUV HV turn-on procedure (on Fri afternoon)
• COS-to-FGS Alignment/Coarse Focus (11468, COS NUV “First
Light”)
o First 5x5 pattern completed nominally; appears to be
external light in at last one tile of pattern
o Science data not yet received.
 Due around 9:30 am, local.
o Failed target acq (HSTAR 11874 mentioned above) is not
understood, since all other data are consistent with a
successful observation.
• For more science details on the FUV HV ramp and the NUV firstlight, see attached COS_SMOV_update_11June2009
FGS/OTA
 All acquisitions and h/w nominal.
 15 POL preliminary analysis charts provided by Goodrich.
• See attached 15 POL after 3rd AMA move Rev A
o AMA move history Review
o S curves at position 8 before/after AMA moves
 X remains good, Y significantly improved as
planned.
o S curves and field dependence for 15 POL
 Field dependency better than FGS 1 or 3.
 K-Factor gain adjustments for guiding is not
necessary but is desireable.
• K-factors needed for SMS-182.
Schedule will be reviewed at Tuesday
GSAWG.
 Will use M35 in August to monitor S-curve changes.
FGS SMOV observations are completed.
o Awaiting K-factor, etc. updates targeted for SMS180
•
•
o
ACS


o
STIS


o
Engineering
• Status: Operate, WFC/SBC LV On
• Tiger Team investigating the WFC CEB-R output drain voltage issue
presented their findings on 10 June
o Recommendation to continue with ACS SMOV
o Intercept for the 159 SMS expected at some point on 11
June
o OR 18506-0 submitted to restore ACS CEB-R ASIC Offsets
prior to the intercept
• Forward Plan
o Post-BEA UV check scheduled 162/20:55 UTC
Science. LSmith
• Nothing to add.
Engineering
• Status
o Operate/CCD On,MAMAs 1&2 LVOn (SAA cycling)
o OR 18504-0 successfully completed at 161/14:44 UTC to
clear STIS event flag 3 for MAMA2 Checkout Part 3
• Forward Plan
o CCD daily darks & bias monitoring continuing 161/19:38 –
21:09 UTC
o Visit 3 of 4 for the MAMA2 (NUV) HV recovery scheduled for
162/17:22 UTC
o Visit 4 of 4 for the MAMA2 (NUV) HV recovery scheduled for
164/17:15 UTC
 OR 18505-0 submitted to clear STIS event flag 3 for
MAMA2 Checkout Part 4
Science. CProffitt
• A quick look at the FUV dark data shows values that are consistent
with past experience.
• The extra glow still comes up after the HV has been on awhile.
o We should have a more complete analysis for tomorrow's
meeting.
• VIsit 3 of the NUV MAMA HV recovery will occur this evening
o ramping to 300 V below the usual voltage.
o This should allow us to see counts at a reduced rate.
NICMOS/NCS
 Status
• Safe
• NCS remains Safed
 Forward Plan
• Project is attempting to schedule a meeting next Tuesday to discuss
NCS restart
-
P&S Status
o
o
-
Calendar/SMS builds
 159 Intercept should be delivered before noon.
 166 should be delivered tomorrow.
 173 in work, TDRS population will start on Monday
 New SMOV Chronology spreadsheet by EOD.
Replans
 The 159 intercept contains the ACS CTE and Cross-Talk external visits that
were temporarily on hold for the Vod Tiger Team analysis.
Operations
o
FOT


o
PACOR: BPatel
 From June 10 (8am) to June 11 (8am), Pacor-A received two events with
fast-track observations. The data was processed and delivered to OPUS
without any problems.
o
OPUS
 Continuing to fast-track science data
• COS proposal 11468 coming late this morning
• data for STIS proposal 11351 and ACS proposal 11372 coming
tonight.
• Proposal 11468 data will be used by George Hartig to find offsets for
a “use offset” genslew coming up on Saturday
o will submit an OPS request for this on Friday.
Archive
 Nominal
o
Nominal
Upcoming critical supports (162/18:01:33 -162/18:42:40 TDW
162/19:49:45 - 162/20:36:44 TDW , 162/20:37:16 - 162/21:12:45 TDE)