SMOV Status & Planning Meeting Notes 5/28/09 - Summary: Observatory and instruments continue to perform nominally and according to plan. The excess PCS gyro jitter, reported previously, appears to have little or no affect on actual boresight jitter, which is ~ 2.5 mas, as measured by FGS and consistent with pre-SM4 predictions. For ACS, the SBC activation sequence and WFC Optimization Campaign have both begun. STIS memory dump verification is underway. WFC3 science data buffer verification data have been collected and analysis is proceeding. - Observatory Status o PCS/SAC Evaluation of high vehicle jitter concluded; • Upon further review, true vehicle (bore sight) jitter is as expected for the G3456 configuration ( ~ 2-3 mas) o Consistent with predictions pre-SM4 that G3 would not contribute to jitter o PCS tools have historically used VCL position path (QDVTHEP) data as estimate of bore sight jitter o RS148 16 Hz resonance corrupts VCL parameters, including position path o True bore sight jitter as measured by FGS is ~ 2.5 mas • PCS tools will need to be modified to remove G3 high frequency noise (low pass filter) for trending, along with addition of periodic checks using FGS data for jitter calculations • Request to reconfigure to G456 configuration for VDT2 interval to observe high frequency disturbances (post gyro calibration) • High frequency currently dominated by G3 noise, masking structure disturbances • Recommend that G345 be restored following VDT2 for remainder of SMOV and continued science operations o As true bore sight jitter is unaffected by G3 noise, no impact to science o G456 will be a relatively quiet configuration wrt true jitter o Source of 16 Hz resonance is unknown and could be indicative of life limiting characteristic of the gyro o Noisy G3 signal could be problem with poor geometry 3 gyro configs, reduced gyro ops • For more info, see attached SMOV_PCS_May_28 PCS performance is otherwise nominal o EPS o TCS CPDU1CUR at 19.00 amps. Still flagging OOL. HSTAR? Yes. • Still working on getting a good limit. Battery performance still improving. HSTAR on V3 equipment shelf this morning (1 count exceedence on 12 degree limit). Not surprising, will be trended. SIC&DH duty cycle up to 50% due to ACS Optimization Campaign, running at 56.7 degrees which was the predict. Comm tray temperatures being trended as well. MTE temperatures slightly warmer than expected. Analysis underway. o I&C Nominal o DMS Nominal. o 486FSW Nominal o SAFING Nominal. o SIC&DH & P/L FSW Nominal. 48 SBEs total so far, 8 more since last meeting. - SI Status o WFC3 Engineering • Status; Protect Operate nd • 2 iteration of the Science Data Buffer verification completed 147/22:15 UTC. SSR dumps are down, verification by Payload FSW is in-work; • Over the last two days, six checks of WFC3 Buffer RAM have been conducted during SAA passes. The Payload FSW team has analyzed the memory dumps and no bit flips occurred. • WFC3 remains operating nominally in its Protect Operate state. • Tomorrow morning a repeat of the servicing mission functional test will occur via stored commanding. This data will take the nominal path to STScI via PACOR for analysis and will not be captured in realtime. • The next major activity for WFC3 will be transitioning out of its Protect state and detector cooldown, tentatively scheduled for the week of June 7th. • Forward Plan o Activation Test (re-execution of SM4 FT imaging) scheduled for 149/13:00 UTC o COS Science • Nothing to add. Engineering • Status; Operate/FUV Operate o Vacuum gauge ~4.7e-6 torr • Forward Plan st o Initial NUV turn-on and signal processing check (1 of 3) scheduled for 151/12:00 UTC o OR to be submitted to clear COS event flag 2 following successful NUV turn-on to allow further NUV commanding to proceed. o To be submitted in coordination with STScI before nd ~152/03:15 UTC and 2 part of the signal processing check Science • Nothing to add • Keyes noted that the COS enclosure temperature has risen ~ 3 deg. over the last 24 hours. Probably due to activations of other SIs. o FGS/OTA Status; all h/w nominal, no new HSTARS All 5 GSACQs in last 24 hours successful. 4 more over next 24 hours. For more info, see attached SMOV-OTA-May-28 Recommendation to approve Ed Nelan’s request to modify proposal 11458. o ACS Engineering • Status; o o o • Operate/SBC LV SBC successfully turned on 148/03:10 UTC Sci & Eng concur all nominal – OK to clear event flag Oscilloscope mode optimization observations began 148/03:48 UTC Forward Plan o Oscilloscope mode optimization continues.. Science (Golimowski) • WFC anneal (Prop 11367) is complete. We are awaiting data from this Proposal, but initial bias and dark frames from fast-tracked Optimization Campaign show that the number of hot pixels has been significantly reduced from the levels seen in the Functional Test data. • The SBC turn-on (Prop 11370) is proceeding as planned. The first phase (signal processing) has completed and verified. Authorization for commencement of phase 2 has been given. • Specific comments from Tom Wheeler: ACS SBC Initial Turn-On Signal Processing Test - Prop11370, Visit 1 The SBC signal processing test commenced at 05/27/09 11:10pm EDT and completed at 11:26pm EDT. I have reviewed the data and have found that all voltages, currents, and temperatures are within expected values. Also, when the threshold voltage was reduced to 0.28V, the number of ORCounts received (~15000 counts/second) for the charge amp temperature (~12 dgC) is within the expected value. The signal processing electronics appears to be alive and functioning properly. From my examination, the first phase of the SBC turn-on (the signal processing test) passed. I recommend that Flag 2 be cleared to allow the next phase to proceed. • Iteration 1 of the Optimization Campaign commenced at 11:10 pm last night. Four of 6 scheduled data dumps have been completed (Visits G2, A1-A3). o Fast-tracking of data through OPUS is running smoothly. o Analysis of Performance Summary data commencing today. o A daily status review with GSFC will occur at noon today. o Checks of OPUS header keywords through first 3 data dumps show that all commanding was nominal. Bias and clock voltages are consistent with expectation, notwithstanding the usual coarse telemetry. The most significant deviations from the expected voltages are V_LG = -2.5 (instead of -3.0 V) and V_RG (HI) = +8.4 V (instead of +8.0 V). The -0.5 V discrepancy for V_LG is typical; the +0.4 V discrepancy for V_RG (HI) is larger than expected, but not far outside the usual scatter in the telemetry. o STIS o - NICMOS/NCS No change P&S Status o o - Engineering • Status; Operate/MAMAs 1&2 LVOn • Memory Load/Dump verification completed at 148/06:40 UTC • SSR dump is down, verification by Payload FSW is in-work • Forward Plan o Science Data Buffer verification scheduled for 149/19:11 – 20:45 UTC. Verification by Payload FSW to follow SSR dump of data o Mechanism Functional Test begins 152/01:20 UTC st o 1 FUV MAMA turn-on 153/11:35 UTC Science • STIS data will begin to be taken next week. o The FUV MAMA recovery will be ongoing throughout the week o Several CCD internal and external programs will execute. • The FUV MAMA turn-on data is fast-tracked o but for the CCD data we will be relying on the archive. • The first round of the CCD data will be taken between Tuesday, June 2 and Friday, June 5. o Goal to decide by COB on Tuesday June 9 whether it is OK to proceed with the release for STIS CCD ERO and science observations beginning June 15. Calendar/SMS builds; SMS152 • TDRSS contacts being worked for required fast-track dumps • Goal to deliver this afternoon SMS159 • TDRSS schedule will be worked on Monday • Decision on targets for FGS AMA Iter 4 (day 159) o On the basis of data from AMA “pre-visits” (151) KSembach asked for first external light for each instrument. • Action to Carl Replans None Operations o FOT o o Completed Ops Requests: #18455-2 18455-2 Change Block Offset to 15 for SSR Sci P/B’s @ 147/09:01z, 148/00:22z, 148/00:40z, 148/02:42z, 148/04:47z, 148/06:31, 148/07:17z #18428-3 Cfg tasking order to collect SI MEM dumps @ 147/14:15z &14:50z #18457-1 Restore normal COS tasking orders @ 147/15:50z #18459-0 Reset Safing Red Limits @ 147/19:43z PACOR All nominal Pacor-A received four events with fast-track observations. • The data was processed and delivered to OPUS without any problems. OPUS & Archive Starting early this morning, data for iteration 1 of the ACS optimization campaign (proposal 11809) were fast-tracked • No problems so far. • Will continue fast-tracking data today and tomorrow until iteration 1 is complete.