SMOV Status & Planning Meeting Notes - 21May09
CORRECTION TO 20MAY09 MEETING NOTES: It was erroneously stated that “Without HRC,
NICMOS is the only real coronagraph on board.” The correct statement should have read
“Without HRC, NICMOS provides unique coronagraphic capabilities (beyond those
afforded by the STIS occulting wedge).”
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Flash Report included in morning Snapshot from Scott Swain; Since the intercept of
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the Health & Safety load earlier this afternoon, the following SI activities have been
successfully executed:
o SM4 Ops Request 137-0 to dump the NSSC-1 status buffer was completed at
140/17:55 UTC.
o SM4 CP Sequence 180 to load NSSC-1 FSW BQ 9.0.4 was completed at
140/19:37 UTC. The image was successfully loaded across the 16-bit interface
from the 486, dumped to the ground, and verified by Payload FSW. In
conjunction with the activation of 9.0.4, Ops Note 1825-0 was implemented to
manage the ground system SOI configuration, superseding Ops Note 1800-1.
o SM4 Ops Request 91-2 was successfully completed at 140/19:39 UTC, setting
NSSC-1 ACS event flags 7 and 9 for inhibiting turn-on of the HRC and its TEC.
o SM4 Ops Request 103-1 was successfully completed at 140/19:41 UTC, setting
NSSC-1 WFC3 event flags 6, 8, and 9 to set Protect mode and inhibit turn-on of
the UVIS and IR1 TECs.
o Normal Ops Request 18434-2 was successfully completed at 140/19:46 UTC,
adjusting the WFC3 Optical Bench Cold Plate (OBCP) and Variable
Conductance Heat Pipe (VCHP) setpoints to 19.8 degC and 14.8 degC
respectively. The WFC3 thermal system will continue to be monitored over the
coming days for any additional adjustments.
o SM4 Ops Request 125-0 to load COS Control Section (CS) FSW version 4.09A
was completed at 140/21:08 UTC. The image was successfully loaded, dumped,
and verified by Payload FSW. Following the load, COS was briefly transitioned
up to Operate to activate 4.09A, and subsequently returned to Safe to await the
rest of SMOV.
o The final two STOCC SM4 CP Sequences 181 and 182 were successfully
completed at 140/23:04 UTC. These sequences re-enabled the Cooling System
High Voltage Protect Sequence in the NSSC-1 and the 486 Neon Leak
Safemode Test, returned the ESM to Operate mode with the PCE enabled, and
transitioned the NCS CPL from Hold to Standby at a reservoir setpoint of -34
degC.
o Many thanks to all those involved in the nominal completion of all these activities.
Special kudos to the FOT for submitting several TDRSS requests for forward
and return services to enable us to more efficiently execute all of our
commanding.
SM4 Command Plan execution is complete. No outstanding SM4 Ops Requests.
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Observatory Status
o
PCS/SAC
 VDT begins 143 / 0642.
 First large maneuver performed (176.5 degrees) from the North BEA
attitude to the South BEA attitude at the start of the H&S SMS. Post
maneuver OBAD measured ~6 arc-seconds/degree of slew. Errors of
this size expected prior to gyro calibration. The gyro bias was updated
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EPS
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TCS
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I&C
o
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DMS
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42 arc-sec/hr before the transition to the H&S SMS. Prior bias update
was 20 hours earlier. Biases continue to trend nominally
False FHST Target suppresses (ground derived parameters) observed
during OBADs. This is a similar signature observed during the previous
3-gyro control periods. These mnemonics are on the Routine Out Of
Limits list. Have not experienced any FHST target suppress events
since deploy. Ops note written to turn off limits to prevent false positives.
If an actual FHST target suppress occurs, this ground derived parameter
may toggle briefly out of limits (not guaranteed) before the protection
circuitry closes the shutter.
HSTAR (target suppress) FOLLOWUP Ground Parameter, not
telemetry, no VALID (shutter closing) suppresses on orbit. Ops Note in
place.
The new batteries continue to perform well with the SOC increasing to
483Ah (as of 5-20-09 4:30pm EDT). Battery temperatures are stable,
ranging between -4 and 0 deg with redundant heaters cycling. Due to
the relatively low load ranging between 60 and 63A, the charge system
continues to have orbits where the battery voltage does not decrease to
the charge-on threshold. In spit of these orbits of low rate charging the
time based recharge ratios remain healthy ranging between 1.02 and
1.25. EPS expects this no-reset behavior to cease once the electrical
loads increase due to SI operations. EPS will begin assessing the SI
loads as the instruments are put through their paces during SMOV.
Performance inline with predictions. Bay 5 a bit lower than predicts.
One OTA measurand went low by one count (HSTAR TBD) – why was
the Ops Note cancelled.
No report.
ESBs dumped / cleared.
DMS is nominal.
ESBs which occurred during SM-4 were dumped and cleared. All ESBs
were for HGA Torque Exceeded Limit.
SSR EDACs which occurred during SM-4 SSR playbacks were cleared.
Limits disabled during SM4 (DSDCEDC0, DSDCEDC1, DTR2MTRC)
were re-enabled.
SSR engineering dump planned for 142/03:10. This dump will contain
the remainder of the engineering data recorded during SM4.
486FSW
 All nominal. Procedure for VT curve change ready as soon as we get
the numbers from EPS.
SAFING
 Safing is nominal.
 486 safemode tests Neon Leakage test and SI PIT Toggle safemode
tests were temporarily disabled to install the NSSC FSW 9.0.4 software.
These tests were disabled at GMT 140/17:57. SI PIT Toggle was reenabled at about 140/19:00. Neon Leakage was re-enabled at about
140/22:45.
SIC&DH & P/L FSW
 Nominal B-side operation
 19 SBEs (2 overnight). Times are on EDOCS.
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SM4 Ops Request 137-0 to dump the NSSC-1 status buffer was
completed at 140/17:55 UTC
SM4 CP Sequence 180 to load NSSC-1 FSW BQ 9.0.4 was completed
at 140/19:37 UTC
• The image was successfully loaded across the 16-bit interface
from the 486, dumped to the ground, and verified by Payload
FSW
• In conjunction with the activation of 9.0.4, Ops Note 1825-0 was
implemented to manage the ground system SOI configuration,
superseding Ops Note 1800-1
Forward Plan; OR 18428-2 to set/maintain SDH tasking orders for SMS
dumps.
SI Status
o
WFC3;
 Still in Safe until recovery during day 142 SMS.
 SM4 Ops Request 103-1 was successfully completed at 140/19:41 UTC,
setting NSSC-1 WFC3 event flags 6, 8, and 9 to set Protect mode and
inhibit turn-on of the UVIS and IR1 TECs
 Normal Ops Request 18434-2 was successfully completed at 140/19:46
UTC
 Adjusted the WFC3 Optical Bench Cold Plate (OBCP) and Variable
Conductance Heat Pipe (VCHP) setpoints to 19.8 degC and 14.8 degC
respectively
 The WFC3 thermal system will continue to be monitored over the coming
days for any additional adjustments.
 The CEB and DEB operate temperature limits are very close to their
present temperatures. If they do not warm after the other SI's are brought
up, then WFC3 will be very close to safing upon SMS based transition to
operation on Monday morning. [Discussion during SMOV meeting
resulted in plan to change limits by 1 degree to reduce this risk.] WFC3
cold plate thermal setpoints were adjusted Wednesday afternoon. This
appears to have resolved the heater oscillation issue at the minimal cost
of dropping the optical bench temperature by 1 to 1.5 degrees.
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o
COS
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Forward Plan
• Stored commanding instructions to be modified to lower the CEB
and DEB safing limits in the transition up to Operate for DOY 145
• Test SMS to validate changes to be run in VSTIF today or
tomorrow
• Stability will come with operate (not protect operate).
• SMS Turn on will change limits – Hickey will put a new OR in
place to reset VCHP afterward.
• We are one count away from a temperature induced safing on
Monday morning once the 145 SMS .
o Hickey will do draft OR. Limits are in stored
commanding. This is a viable alternative to pre-warming
the box. Cold operate limit is -15C. Alan will get a test
SMS to us within a few hours. Need a freeze form – lab
test (0.5 hour) will be today or tomorrow.
Still in safe. Vacuum gauge ~3.6e-6 torr
SM4 Ops Request 125-0 to load COS Control Section (CS) FSW version
4.09A was completed at 140/21:08 UTC
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The image was successfully loaded, dumped, and verified by Payload
FSW.
Following the load, COS was briefly transitioned up to Operate to
activate 4.09A, and subsequently returned to Safe to await the rest of
SMOV
Forward Plan
• COS Recovery and memory check DOY 142
• OR 18436-1 for FUV door opening (see separate presentation)
o OR 18436-2 to be submitted to add in management of
HV Protect table around door opening
o Expect door opening at ~ 10:30 tomorrow.
Door opening plan presented by JBacinski in charts.
• Change from previous plans is to be even more conservative
and disable the TPS limit before opening and re-enable
afterwards. TPS limit is 2.0e-5.
SSR dump 3 hours after COS & ACS memory dumps (about 10am
tomorrow).
Requested SSR downlink time for COS memory check data (COS02,
program 11353); data will downlink Fri ~10 a.m.
COS FUV door opening on Friday following all other activities
FGS/OTA
 All H/W nominal, no HSTARS have been submitted.
 Ops Note to drop the FGS 1 pickoff mirror thermocouple from 18 to 17.5
deg was cancelled, as it stabilized above the yellow limit of 18 deg at
18.13 deg C.
 FGS 1,3 Acq at ~ 1:43 AM
 FGS 1,3 Acq at ~ 3:00 AM
 FGS 2 ITS data take at ~7:48 AM
ACS
 Safe, all voltages and current nominal.
 SM4 Ops Request 91-2 was successfully completed at 140/19:39 UTC,
setting NSSC-1 ACS event flags 7 and 9 for inhibiting turn-on of the HRC
and its TEC
 Forward Plan
• Draft OR submitted for ASIC timing pattern load on DOY 141
• ACS SMS Recovery and memory load/dump on DOY 142
• JV0032 FSW install patch (SMS) for default clock and bias
updates DOY 145
• Draft OR for ASIC patch in place will promote now that we have
MEGG.
• OR’s for event flag management will be occurring.
 Working group planning to remove HRC stored / RT commanding
 Ops Note to be drafted to handle expected ACS 290 ESBs.
 Event flag 7 is set after NSSC1 to disable HRC. Note for FOT.
STIS
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Still in safe. HSTAR 11840 still under analysis. Tiger Team met
yesterday. Mgmt meeting is tomorrow.
Preliminary conclusions of the CCD Amp B Anomaly Tiger Team
are that
• (1) it is not possible to turn off the A/B amps and still use
the CCD
• (2) the risk of the observed anomaly leading to
a failure that could threaten either the CCD or STIS is very
remote.
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So recommendation will be to proceed with the STIS SMOV plan without
any changes to STIS or CCD operations.
However, to give Project/STScI management and the Tiger Team a
little more time to consider their conclusions, STIS turn-on
and subsequent SMOV activities will be delayed to at least
the 145 SMS (~ 1 week).
NICMOS/NCS
 ESM/CPLs nominal. NICMOS in safe.
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P&S Status
o Calendar/SMS builds
 Delivery of 142 SMS (TBD) execution starts 142/0500.
 Delivery of 145 SMS (TBD) execution starts 145/0000.
o Replans
 Start of STIS SMOV activities moved from SMS142 to SMS145 (~ 7
days).
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Operations
o FOT
 SMIT completed 23:04:42
o PACOR;
 There were no SMOV fast-track activities to support for Pacor-A from
May 20 (8am) to May 21 (8am). Routine data processing has resumed
as normal.
 ‘Fast Track’ activities start tomorrow. Ready.
o OPUS; All OK
o Archive; All OK