Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.stsci.edu/smov/SMOV4%20WEB%20PAGE%20OCT2007/smov4notes/SMOVSPMNotes22Jul09.pdf Дата изменения: Thu Jul 23 18:28:38 2009 Дата индексирования: Sat Mar 1 23:46:39 2014 Кодировка: Поисковые слова: solar eclipse

SMOV Status & Planning Meeting Notes 7/22/09
Summary:
The PC S team has inves tigated the body-rate low- mode test failure (reported in July 20 notes); the cause is now understood ( See attachment for details). The SM mirror adjustment perfor med on July 20 appears nominal des pite the anomalous actuator voltage behavior. Subsequent WFC 3 and C OS observations are consistent with a successful focus move, but cannot yet be used to confirm it. WFC3 U VIS zero-point analysis is ongoing and looks nominal. The COS FU V alignment/focus process continues along with NU V SMOV calibrations. STIS has been recovered from Suspend and returned to Oper ate. As a result, an intercept SMS has been built to resume CCD internals . The intercept also contains the Jupiter DD TOO, which displace two W FC3 SMOV calibrations. Plans for resuming STIS MAMA operations and NICMOS/NC S cooldown are taking shape.

- Observatory Status
o PC S Body-rate low- mode test failure on day 200 ( See July 20 notes) · Separate meeting ( after SMOV meeting) to discuss ( See the attached H STAR_11932) · Investigation has shown cause to be Acquis ition Initialization Command o sent us ing a default target vector for velocity aberration (VA) while VA was enabled. o This resulted in a step change in the VA contribution that directly impacts the vehicle pointing. · This w as not an issue in TGS since gyro-only observations were not done. o With return to 3 gyro observations , w e have had gyro-only observations . · The upcoming Jupiter moving-target observation uses guidestar tracking o Therefore problem should not recur . Nominal WFC3 thermal splinter held yes terday · Still need to decide on worst-case ther mal configuration

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TCS

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Safing Yesterday's solar eclipse w as handled nominally by H ST Other subsystems Nominal

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SI Status
o WFC3 Science · 11450 UVIS zeropoint measurements o Look nominal as a SM focus check


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But error bars are too large to confir m ac tual SM movement 11431 UVIS Anneal o Anneal temperatures looked nominal o Second ins tance of on-orbit sms-commanded anneal For more info, see the attached WFC 3_SMOV_report20090722

Science. TKeyes · NUV focus sweep (program 11469 visit 94) executed on Monda o After the H ST secondary mirror move o Appears nominal (but error bars are large) o Focus position is well w ithin nominal breathing range for this observation. · Data from v isits 1-3 of program 11484 (FU V Optical Alignment Focus Sweeps) has been obtained. o All TA appear to have func tioned nominally . o The target for visits 1 and 2 ( G130M and G160M sweeps) is fainter than expec ted, especially for G160M. Possibly due to unexpected s tellar reddening o Analysis is proceeding to determine best focus , but is difficult. o The target for visit 3 (G140L sweep) appears nominal data are s till coming down for that visit. o Will have more to report on Friday. · 11479 v isit 1 (NUV Quicklook Sensitiv ity) o Data obtained nominally . o Analysis is ongoing. · Inter nal program 11496 visits 1 and 3 o Data was also obtained nominally. o Visit 1 ( PtN e lamp 2 verification is nominal data have also been analyzed as get-ahead wavelength range assessment · no OSM2 encoder adjus tment necessary to place appropriate wavelength ranges on stripe B · analysis is proceeding for stripes A and C . Visit 3 (Grating Efficiency Test) analysis is underway, results later this week. · USE OFFSETs for observations on Sat/Sun o To be delivered tomorrow .

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FGS/OTA Secondary Mirror · Anomalous AC E bus voltage behavior during SM refocus procedure at (7/20/2009 9:33) · All indications ar e that the move was nominal o Although there is no direct confirmation of actuator movement in telemetry o Confir mation is provided by assessment of focus at the SIs. See WFC3 & COS reports , above ACS STIS · AC S SMOV is complete.

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Engineering · Status o o · Forwar o

Recovered from Suspend to Operate at 202/1615 CCD internals to resume July 23 (intercept SMS) d Plan Tiger Team troubleshooting is ongoing



Science. C Proffitt · Resumption of STIS MAMA oper ations o Remains under discussion o Status briefing on Thurs, July 23, 1 pm

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NICMOS/NC S Forward Plan · NCS restar t attempt scheduled for next Tues., July 28

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P&S Status
o Calendar /SMS builds SMS208 · Being reworked SMS215 · "Hunting and gather ing" mode s tarts today. Replans SMS201 · Intercept SMS to be delivered this afternoon o For resumption of STIS CCD internals o WFC3 DD TOO ­ Jupiter observation (12003) Displaces · WFC3 1144502 (1 orbit visit) and W FC3 1179802 (1 orbit visit). · Both should be reschedulable in either the 208 or 215 calendar.

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Operations
o FOT 11937: 202/22 · · COS Digitizers DCe tDC Begin and End Walk AY Limit Violation @ :42Z Noise, not real Limits may need adjustment

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PACOR Nominal From July 21 (8am) to July 22 (8am), Pacor- A received eight events with fast- track observations . · The data was processed and delivered to OPU S w ithout any problems. OPU S (TEllis) No new OPU S issues to report. We will be fas t-tracking data for COS proposals 11484, 11474, and 11470 in the next 24 hours · offsets have been loaded for the "use offset" genslew o scheduled to execute this morning for C OS proposal 11474. May install OPUS quick-fix 2009.2g today.


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Waiting for feedback from the NICMOS team o checking regression data

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