Thursday 27 May 2004

1. Boundary conditions

* SOHO is "right side up" (roll angle zero) until the next manoeuvre,
  tentatively scheduled for 22 June. The fuel estimate for the station
  keeping (only) is 0.396 kg

* The scheduling windows for the next 2 keyhole periods are given
  below.  For estimated keyhole dates through 2006 see

  Sep 12        High Rate on 26m stations ends, TBC
  Sep 17        High Rate on 34m stations ends, TBC
  Oct 01        High Rate on 34m stations resumes, TBC
  Oct 05        High Rate on 26m stations resumes, TBC

  Dec 13        High Rate on 26m stations ends, TBC
  Dec 16        High Rate on 34m stations ends, TBC
  Dec 26        High Rate on 34m stations resumes, TBC
  Dec 29        High Rate on 26m stations resumes, TBC

* Long-term DSN outlook: The Mars missions may last through the end of
  the year. Expect keyhole schedules similar to the last/next one as
  long as they are operational.

  The long-term scheduling for 2005 and 2006 indicates that there will
  be very substantial losses of normal VC0/1 during most keyholes, but
  we hope that the SSR patch will be there to capture GOLF, VIRGO and
  MDI structure with no interruptions.

* Work on an on-board patch for recording only selected APIDs
  (e.g. GOLF, VIRGO, MDI and possibly some spacecraft housekeeping
  data) on the SSR is progressing. However, due to a slip in the work
  schedule, the patch may not be ready in time for the June keyhole.

  If the patch is finished in time, it will be tested shortly before
  the June keyhole.  The test plan will be worked out between MDI,
  GOLF and VIRGO in particular as well as the other instruments (for
  technical reasons, everyone else loses data during the test even if
  the patch works and the test is performed during a pass).  since
  they're not recorded and what goes into the recorder is also what
  comes out the antenna as VC0/1). It is too early to say how the test
  will be performed. The patch will first be simulated on the
  simulator. We will also consult with instruments to schedule the
  patch itself.

  If the patch cannot be used for the June keyhole, "traditional"
  recordings and contingency plans will be used to ensure continuous
  data for GOLF and VIRGO.

* The DSN schedule (updated May 19), dates/times of first/last VC0/1
  loss, and planned traditional recording intervals for the June
  keyhole can be found at

  The corresponding plot of the Tape/Solid State Recorder usage etc
  can be found at

  If the patch is somewhat delayed, the test time will depend on
  whether or not it is feasible to do so without breaking the
  continuity of GOLF and VIRGO data.

* Unless a Major Flare Watch is in progress, TRACE will be doing full
  disk mosaics if/when EIT is not able to do synoptic sets due to
  keyhole operations.

* MDI continuous contacts

  May 24-Jun 6  MDI Continuous Contact (High Resolution campaign)
  Jul 4-Sep 5   MDI 60 Day Continuous Contact (Full Disk Mags and Doppler)
  Nov 3-7       MDI Continuous Contact
  Dec 1-5       MDI Continuous Contact

  The baseline plans are as stated above, and other types of
  observations are not likely for these time periods even if requested
  for collaborations. As usual, 96 minute magnetograms will be

* ALL KNOWN submode dependent activities & submode schedule:

  TOO           JOP175 Extended Filaments at the Limb (see sect. 2a)
  Apr 14-Jun 17 SUMER campaign and MEDOC campaign #13
  Jun 2         EIT Shutterless 20:00-22:40 UT
  Aug 25        EIT Shutterless, TBC
  Sep 1         EIT Shutterless, TBC
  Nov 24        EIT Shutterless, TBC
  Dec 1         EIT Shutterless, TBC

  Submodes: Submode 5 until June 2, 14 UT
            Submode 6 until June 3, 02 UT
            Submode 5 until June 17 (time TBD)
            Submode 6 (until further notice)

* June 3-17 MEDOC Campaign #13

  Note - this campaign begins & ends on Thursdays, avoiding the June 2
  EIT Shutterless which must be in Submode 6. The science planning for
  the Shutterless may be coordinated from MEDOC, though. See this web
  page for details:

* EIT Bakeout/Other (shutterless obs listed under "Submode dependent
  activities" from now on):

* Jun 20-Jul 1  EIT Bakeout, TBC

  NOTE: This is only a suggestion from SOCs, based on the first/last
  days of significant VC0/1 losses during the summer
  keyhole. Operational constraints have not been considered.

* Commanding outlook: See AOB section.

* No Mercury Transits in 2004: See January 2004 SPWG minutes for
  details on close calls (all above 1.6 degrees).

* Venus Transit: The DSN schedule for the Venus transit (June 8, DOY
  160, closest approach at about 13:40 UT) is currently as follows:

  2004/06/07 1710-0105 UT DSS-27

  2004/06/08 0450-1330 UT DSS-66
  2004/06/08 1310-0115 UT DSS-16

  2004/06/09 0440-0720 UT DSS-66

  This is only a coronal transit seen from SOHO. We will likely be in
  record for most of the time covered by the two passes on June 8,
  restricted by the need to ensure that no MDI Magnetogram is lost
  during the Venus transit. VC2 periods will be inserted as needed to
  preserve all magnetograms (timing may be dependent on downlink

  An updated ephemeris spanning 3.5 days centred on the closest
  approach, w/IDL tools, a plot, and other information is available at The ephemeris is based
  on an orbit determination made after the post-ESR manoeuvres.

  The Venus transit will be observed by SUMER, CDS, EIT, UVCS and
  LASCO.  We will be in Submode 5 during the Venus transit. The SUMER
  observations will require NRT (shared, w/pauses) from 08 UT - 20 UT.
  UVCS observations will span June 7-9, with a 9-hour exclusion
  centred on the closest approach.

  We will ask to have the FOT SVM Reserved Time be after the SUMER
  observations finish, ~20 UT.

  LASCO will do special observations with ground based observatories
  from about June 3 to June 13. In Submode 5, this will mean a roughly
  2-hour hole in EIT's CME watch those days. In addition, heavy
  commanding will be needed for LASCO C2 observations while Venus is
  in the C2 field of view. Venus is expected in C2 from June 7 ~12:00 UT 
  until June 8 03:00 UT AND AGAIN from June 8 16:00 UT - June 9 08:00 UT.  
  During the times through C2 and EIT at transit, there will be continuous 
  staffing in the EOF for the observation programs planned.

  TRACE will also observe the Venus Transit.

2. Priorities for the coming month & more

a) Joint observing plans and campaigns

Continuing campaigns:

*               JOP136 Default RHESSI Collaborations (#6850), POC:Stein Haugan
*               Default CDS Co-observations with TRACE (#6950) 
*               JOP153/MMOP003 Major Flare Watch (#7030)
*               JOP159 CMEs in Lyman-alpha (#6870), SWAN/LASCO/EIT/UVCS,
                  POC: Chris St Cyr, Eric Quemerais
* Feb-Sep 2004  Quiescent AR Loop Diagnostics (#7019), CDS/TRACE/EIT/SUMER, 
                  POC: Helen Mason (, 
                  Local POC: CDS Planner
*               JOP175 Extended Filaments at the Limb, EIT/TRACE/LASCO/UVCS, 
                  POC: Chris St Cyr (
*               Network-Internetwork Oscillations (#7033), EIT/TRACE, 
                  POC: Scott McIntosh

  Campaign #6850 is for "individual instrument studies" selecting an
  AR target [partially] influenced by the Max Millennium target
  selection to maximise chances of serendipitous co-observations.
  The running of the Quiescent AR Loops is left to the decision of the
  CDS planner.

  EIT supports all with half/full-res 195  CME watch in submode 5/6,
  except JOP175 getting half/full-res 304  CME watch in submode 5/6,
  and Network-Internetwork Oscillations which is TBD by Scott McIntosh.

* Mar-May       JOP172 Coronal Micro-Events (#7039), RHESSI/TRACE/CDS/MDI/EIT,
                  POC: Karel Schrijver (, TOO

  This is being run at the moment.

  EIT: CME watch and synoptics.

  MDI supports as it runs as a TOO, with 96 minute synoptic magnetograms.

  Note: RHESSI is by default in the correct observing mode for this
  study: The attenuators are only used (autonomously by the spacecraft)
  when solar activity dictates. In other words, the scheduling can be
  left quite open.

* Apr 14-May 30 JOP104/MMOP007 X-ray Flows and Coronal Micro-Events (#7034),
                  SUMER/EIT/TRACE/RHESSI, POC: Werner Curdt

  EIT: CME watch.

* May 23-Jun 6  Ulysses Quadrature, UVCS/SUMER/Ulysses

  SUMER will place the slit off-disk to the south-east quadrant and
  will (hopefully) observe CME-like events in various temperatures.
  Observations will start on May 28 and run until June 1 (EIT

  The quadrature position angle is 94.8 degrees (4.8 degrees south of
  the equator at the east limb).

* May 27-29     Spicules, Mottles, and Jets, MDI/TRACE/SST,
                  POC: Bart De Pontieu (

  MDI will support if the target happens to be inside the HRFOV
  extract MDI will be using at the time.  MDI will run HR Extract
  Mags/Doppler/Filtergrams for our 14 day CC period for May/June.

* June 3-17 MEDOC Campaign #13


  Note new JOP177 and JOP176.

  MDI will support JOP176 with 96 minute synoptic Mags and 1 minute
  Mag/Doppler when we have high rate.  We could support this June

  MDI will support JOP171 June 5-6 with HR three variable extract
  observations in the bottom half of the HRFOV (hopefully, he will
  pick a target in the bottom half of the HRFOV).  June 7 and 9 are a
  bit more flexible in what we can do to support the JOP, when there
  is MDI high rate.  At the very least we can give 1 minute FD Mags
  and Dopplergrams (he wants the HR 3 variable campaign, so it's
  possible that we could do that as well).

  EIT: Looks as though there are at least two programs (JOP 176, JOP 124) that
  would benefit from EIT CME watch in 304 , but JOP 158 may prefer 195 .
  Boundary condition is the DSN schedule, which will determine when the EIT
  CCD bakeout starts.  Bob Leamon will be the EIT planner.

  UVCS plans for the Medoc Campaign are:
    June 03-06, SOHO-Ulysses quadrature observations
    June 07-09, Venus transit
    June 10-13, Coronal holes and the fast solar wind

* Jun 26-Jul 9  Irradiance Variations, TRACE/SST/MDI, 

  MDI can only support this with Full Disk Mags and Dopplergrams.

* Jul 8-15      JOP171 Solar Network Variability and Dynamics, TBC,
                  POC: Hubertus Woehl (

  From CDS' request page. There is a small chance of a conflict with
  another study with VLA, to be solved if/when it arises.

  EIT: synoptics and 195  CME watch.

  MDI can only support with Full Disk Mags and Dopplergrams.

  TRACE still has it listed as TBC.

* Jul 29-Aug 4  JOP157 Bright Points in Active Regions, 

  Etienne Pariat is co-PI for this study.

  JOP012 is a back-up study for this period.
  CDS has a small chance of an overlap with a VLA study.

  EIT not mentioned in JOP description - assume synoptics plus CME
  watch will suffice.

  MDI can only support with Full Disk Mags and Dopplergrams.

* Aug 5-16      JOP083 High Cadence Activity and the Heating of Coronal Loops, 
                  CDS/TRACE/MDI, POC: Robert Walsh (

  CDS has a small chance of an overlap with a VLA study.

  MDI can only support with Full Disk Mags and Dopplergrams.

* Oct 5-15      Photospheric/Chromospheric Motions near Sunspots/Filaments,
                  TRACE/MDI/DOT/Meudon/Pic du Midi,
                  POC: Thierry Roudier (

  More input is expected from Roudier. The dates October 5-15 were
  reported by Roudier through MDI.

  MDI should be able to support this study (no 5-day continuous contact in

* Oct 12-19     JOP012 Limb Prominences, CDS/MDI/TRACE/THEMIS/GBOs,

  SUMER has not yet made a decision about a SUMER fall campaign/MEDOC #14.
  SOC note: Apparently, SUMER is not requested to support this, since
  the study will mainly focus on filaments, not prominences. NOTE THE
  AMENDMENT of the JOP description. An entirely new JOP to would be
  highly welcome, since the current state of affairs makes it quite
  likely that a mix-up will happen during the observations.

  MDI can support, believe they only want 96 minute magnetograms.

* Oct 18-23     CDS/HIDA Observations, CDS/HIDA, TBC

  Details to be provided by Tetsuya Watanabe (

* Nov 23-Dec 2  JOP173 3D Structure and Dynamics of Sunspots, 07:00-22:00 UT,
                  POC: Karin Muglach (

  MDI will likely be able to support this as long as it does not
  conflict with the beginning of the December 5 day CC, from 1-5 Dec.
  HR Mag, Doppler and Filtergrams are requested.

  TRACE still has this listed as TBC.

b) Intercalibration activities

Last Intercal 1: May 5 (Week 19)

W May 26        Intercal 1, CDS/EIT

  SUMER will participate in this (Udo Schuehle will be at the EOF).

  Note from SOCs: It is difficult to see any good opportunity after the
  above until after the keyhole (e.g. Week 28, July 5-11).

  EIT suggests to leave the next one to planners after keyhole & bakeout
  has finished.

c) Individual instrument plans


  See section 1 (boundary conditions) for MDI continuous contact

  MDI will continue to downlink Magnetograms via the 5k telemetry stream
  during Keyholes, as long as the SSR/TR patch is not complete.  Once the
  SSR/TR patch is complete, MDI will likely downlink a Magnetogram in the 5k
  telemetry stream 3 times per day in addition to having near-continuous
  medium-l data.  MDI will not store Magnetograms on board during this time,
  thus the normal vc2obs campaign that dumps stored Magnetograms will not be
  used, should we get VC2 at any time during the Keyhole.

  All requests for MDI support need to be made several months ahead of
  time and sent to Even outside
  keyholes, MDI can only do 1-minute cadence observations when we have
  contact and there is no recorder dump in progress.

  MDI's REQUEST page is at
  NOTE: Listing of a study on that page means *only* that a request has
  been received, not that it will necessarily be supported.

  See their planning page (below) and the SOHO calendar for weekly plans.

  The following are listed because of NRT requirements or as candidates
  for collaboration (with e.g. CDS):

* May 23-Jun 06 SOHO-Ulysses quadrature observations
* Jun 07-Jun 09 Venus transit
* Jun 10-Jun 13 Coronal holes and the fast solar wind
* Jun 14-Jun 16 Annual observations of Zeta Tau
   UVCS will be in a safe configuration (no observations) during part
   of the June keyhole. Detailed plans TBD.


  Planner   Week[s] of       Scientific objective

  Teriaca   24 May          Explosive events, plumes, spicules,

  Also doing JOP104/MMOP007 as a TOO during the entire campaign.  See
  comments in previous section.

  Udo Schuehle will be planner for the Venus Transit.

  See their request diary for details:

  Will be running JOP171 during MEDOC (with Peter Gomory as POC) and
  July 8-15 with VTT/TRACE/DOT.


* Jun 3-13      LASCO Venus Observations, 2 hours per day

  See section 1 (boundary conditions) for EIT bakeouts/shutterless and
  other special items. The day before/after the Venus Transit will involve
  some extended commanding for LASCO C2 images (details in section 1).

  Will observe at synoptic cadence through keyhole.


  NOTE that TRACE in general reserves the right to withdraw support from
  agreed, existing collaborations if a sufficiently "good active region"
  is called by the Max Millennium group.

  The Venus program has been tested, details available at

3. AOB

* Next SPWG: Friday 25 June, right after weekly meeting in the EOF.

* If anyone has projects that require high-cadence MDI support, now is
  a good time to ask! If you need MDI data, make sure you request it
  specifically. There is no significant change in the shutter
  performance over the last 10 months; monitoring continues, but no
  immediate changes in operations are planned.

* DSN support should be requested at least 6 months in advance.  Keep
  this in mind for: ground-based collaborations that require MDI
  support, stellar/shutterless observations that require NRT, etc.

* Commanding outlook:

Week 23 May 31-Jun 06: Good commanding all week.  MDI 5-Day
                       Continuous begins early Wednesday.
                       D27 on Monday, Thursday and weekend.

Week 24 Jun 07-Jun 13: D27 on Monday, Wednesday and Saturday.
                       Continuous dsn on Tuesday after 04:50 UT
                       for the Venus transit. Gap before 12 UT
                       Wednesday and gap 13:50-17:20 UT Friday,
                       otherwise good commanding all week.

Week 25 Jun 14-Jun 20: D27 Monday through Wednesday.  Downlink/
                       uplink station pairs begin Wednesday.
                       Check with the SOCs for ANY commanding
                       during the 34-meter keyhole.

Week 26 Jun 21-Jun 27: Mostly uplink/downlink station pairs.
                       Maneuver Tuesday on D24.  Downlink only
                       pass early Thursday.  Check with the SOCs
                       for ANY commanding this week.

Week 27 Jun 28-Jul 04: Lots of uplink/downlink station pairs.
                       Downlink only station on Thursday as well
                       as Friday.  Check with the SOCs for ANY
                       commanding during the 34-meter keyhole.