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SPWG Minutes Friday, October 26, 2001

1. Review of action items

2. Boundary conditions

* Maneuvers W Nov 07 Momentum Management & Station Keeping Fuel estimate: 0.0307 kg W Nov 14 Roll Day 1 T Nov 15 Roll Day 2 F Nov 16 Roll Day 3 (contingency, DSN coverage until 4am) * We are open for questions regarding the roll. At each dwell position, SOCs can provide delta T since the end of the roll profile to all instruments, but we must be informed about the time intervals. The start of the first roll profile is planned at 6am on November 14, and instruments should upload pre-roll plans the day before, ending close before the 6am deadline. Instruments must verify *prior* to the 6am deadline that their pre-roll observations will/have been executed ok. * HESSI launch may happen "prior to Christmas". Better than "sometime next year"? * Oct 29-Nov 11 SOHO/Ulysses quadrature during north polar pass * VAULT launch (JOP148) has been postponed until sometime in the first two weeks of March. * MSSTA-III EUV rocket launch has a tentative date: March 20, 2002. * TRACE EUV Eclipse started mid-October. Full eclipse from week of Nov 7. * Commanding outlook: See AOB section. * Submodes: Submode 5 until Mon October 29, 13:00 UT Submode 6 until Fri November 9, 19:00 UT Submode 5 until Fri November 16, TBD UT (Not before 16UT) (Note MDI framelist reload). * Leonids on November 17, 18. No action planned for SOHO. * MDI 5-day continuous: October 24-30 * Nov 23-26 UVCS Star Observations, Delta Sco * The MDI team is on a track to reduce the MDI shutter usage to half or less of present usage. See full message under AOB. In short - if you have projects that require high-cadence MDI support, now is a good time to ask, and make sure to make specific requests if you need MDI data. * EIT CalRoc launch shooting for May-June 2002. Would like to have it near a repeated offpoint maneuver. * EIT bakeout next weekend (TBC)

3. JOPs status

New: JOP150 Dynamics and Seismology of the Solar Atmosphere, MDI/THEMIS/TRACE, POC: Alexander Kosovichev Planned for May 2002/end of 3-month continuous (but timing not set).

4. Priorities for the coming month (W45-48, November 5 - December 2)

a) Joint observing plans and campaigns * Oct 29-Nov 11 UVCS Program for SOHO/Ulysses Quadrature * Nov 15-21 UVCS coordinated observations with Ulysses * Dec 2-3 UVCS HeI Focusing Cone The MMOP011 Sigmoidal active region study has been revived by the Max Millennium group (until HESSI launch). b) Individual instrument plans SUMER Will turn off after MEDOC, turning on for the roll on Sunday November 11, participating in the roll, and requesting an Intercal 1 on Friday Nov. 16, before turning off again. UVCS See SOHO monthly calendar for weekly plans CDS * Nov 05-11 CDS Cambridge AR/Flare Campaign See also their request diary (http://solg2.bnsc.rl.ac.uk/scientificops/request.shtml) for details on the following: - Off-limb line-width measurements (4-6 runs of 8-12 hours each, 2-3 on the equator and 2-3 on the poles. No AR in both cases. - Particle beam study (once per week) - Blinkers in coronal holes (8-10 hours on 4 separate occasions) - AR/flare diagnostics (once a week when appropriate) - Sunspot oscillations study (once per week) - Oslo active region loops (T.O.O. run once per week) - Oslo sunspot campaign (T.O.O. run once a week) MDI: * MDI 5-day continuous: October 24-30 Default plan is full disk, high resolution FOV if exceptional target. TRACE: Eclipse season. c) Intercalibration activities F Nov 16 Intercal 1 CDS/EIT/SUMER

5. Preview of future months

* See the Monthly Calendar at: http://sohowww.nascom.nasa.gov/soc/head_calendar.html

6. AOB

* Next SPWG: Friday 30 November, 2pm * The MDI team is on a track to reduce the MDI shutter usage to half or less of present usage. to allow the instrument to be used for another 5 or more years. We expect to have a meeting to review shutter status and plan long-term operations in a few weeks. We are still determining what changes are practical, but one of the things being considered is elimination of the nominal 8-hour campaigns as much as possible, subject to compelling science arguments. So we want to give our colleagues a heads up that MDI may not provide very good collaborative support during the late summer and fall, although we hope to return to collaborative mode in some reduced level around the first of the year. In short - if you have projects that require high-cadence MDI support, now is a good time to ask! Also, if you need MDI data, make sure you request it specifically. * DSN support should be requested at least 6 months in advance. Keep this in mind for: ground-based collaborations that require MDI support, stellar observations that require NRT, etc. * Commanding outlook These times are subject to change - more details available if wanted: Week 44 - Oct 29: Monday has a downlink only station and DSS27. Tuesday and Sunday have DSS27 most of the day. Large gap on Friday. Week 45 - Nov 05: D27 on Monday, Tuesday, Thursday, Sunday. Maneuver on Wednesday. Looks good for Friday. Week 46 - Nov 12: D27 on Tuesday when instruments are doing their pre-roll loads, on Thursday when instruments are recovering/resuming normal science, and on the weekend. Roll on Wednesday and Thursday. Commanding is good on Friday for ICAL. Week 47 - Nov 19: D27 for half a day on Monday, Friday, Saturday. D27 all day for Wednesday and Sunday. D27 then D/L only on Tuesday. Thursday is a good day. Week 48 - Nov 26: D27 for the first part of the day most of the week. Large gap on Tuesday. Sunday is good.