09 June 2023 - Mission Day: 10052 - DOY: 160
Science Operations

SOHO SPWG 26 Jan 2007 Meeting Minutes

1. Boundary conditions

a) Orbit, attitude and manoeuvres

- SOHO is currently upside down

- manoeuvres

  Feb 27        stationkeeping and momentum management (timing TBC); roll
                date TBD

  May 29        roll, stationkeeping and momentum management (timing TBC)

b) Communications with the spacecraft

  Graphical DSN schedule: http://soho.nascom.nasa.gov/soc/dsn/

  Madrid 70 m antenna (DSS-63) is again operational.

  DSN schedule planning is expected to reach end of week 10 (possibly also
  11) on Friday, 19 Jan.

* Feb 13-Mar 12 26 m keyhole
* Feb 20-Mar 5  34 m keyhole

* May 18-Jun 5  26 m keyhole
* May 22-May 31 34 m keyhole

- The need and approach to reduce FOT manpower requirements needed for
  complex operations during the keyhole remains in effect until further 

  All available keyhole information is at

c) KNOWN submode dependent activities/submode changes:

* TOO           JOP153/MMOP003 Future Major Flare Watch (SM5 if SUMER
                observes target, SM6 otherwise)
* TOO           JOP175 Extended Filaments at the Limb (see sect. 2a), SM6
* Mar 13-Apr 30 SUMER/Hinode campaign, SUMER/EIS, TBC by Hinode team
* May 1-14      SOHO/STEREO campaign, EIT/SECCHI (dates TBC after Hinode 
* May 9,16      EIT Shutterless #27, TBC

- Some of the default SUMER campaign dates overlap with keyholes -
  which is not a problem in itself (submode 5 will often be needed for
  keyholes anyhow) as long as potential periods of no SUMER data
  between passes can be accepted.

- Except for Major Flare Watches, TRACE will be doing full disk
  mosaics if/when EIT is not able to do synoptic sets due to keyhole

d) Instrument maintenance activities

   EIT bakeout periods will be during keyholes.  Dates and times are
   defined when the DSN schedules become available.

e) Others

- TRACE eclipses

* Oct 5-Mar 1   TRACE winter (hard) eclipse season

2. Priorities for the coming month and more

a) Joint observing plans and campaigns

Continuing campaigns:

* 2002/02/25--  JOP136 Default RHESSI Collaborations (#6850),
                POC: Tero Siili
* 2003/05/13--  Default CDS Co-observations with TRACE (#6950)
* 2004/02/19--  JOP175 Extended Filaments at the Limb (#7135), 
                POC: Chris St Cyr
* 2005/09/20--  JOP153/MMOP003 Future Major Flare Watch (#8007)

  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.

  EIT supports all with half/full-res 195 A CME watch in submode 5/6,
  except JOP175 getting half/full-res 304 A CME watch in submode 5/6. As
  long as the spacecraft is in submode 6, all EIT CME watch will be in full
  res.  Major Flare Watches will be in full-res even if it requires a
  submode change, unless the target is observed by SUMER.

  The relevance and continuation (whether the originators have
  enough/alternate data) of these campaigns (except perhaps for RHESSI) is
  under review.

* 2006--)May 19 Exceptional Ulysses Quadrature (starts Dec 19, 2006)

  A document from Steve Suess and Giannina Poletto discussing the
  Ulysses-SOHO quadrature geometry is available from Michael Uzzo and also
  at http://sohowww.nascom.nasa.gov/soc/UlyPosAng2007-2008.pdf.

  Given the extended duration of the quadrature, CDS will carry out several
  observations at a convenient date selected at a relatively short notice.

* Feb 1-5       MDI Continuous Contact

  Current default plan is full-disk magnetograms and dopplergrams.

* Mar 28-Apr 1  MDI Continuous Contact

  Current default plan is full-disk magnetograms and dopplergrams.  Timing

* Apr 1-30      SOHO/Hinode campaign, SUMER/CDS/EIS, POC: Werner Curdt

  SUMER starts collecting proposals. SUMER operations including test runs
  etc. will start on 22 Mar (submode change timing TBC).

  CDS will also support (see also section 2c).

  CDS on JOPs: The campaign is likely to consist of a mixture of existing
  JOPs and new studies, hence neither updating an old JOP nor creating a
  single new JOP seems appropriate or necessary.

  Re JOPs - approach TBD - see also section 2c/SUMER.

  --) #EIS - changes, comments? New JOP or update of an old one?

* Apr 25-29     MDI Continuous Contact

  Current default plan is full disk magnetograms and dopplergrams.  Timing

* May 4-17      SOHO/STEREO campaign, EIT/SECCHI/Hinode (TBC),
                POC: William Thompson

  STEREO SECCHI requests synoptic EIT & LASCO data and prefers EIT to be
  obtaining full-resolution images. Hence the SUMER/EIS campaign will take
  place already in March to avoid EIT/SUMER submode conflict (i.e., allow
  SOHO to be in submode 6 during this campaign).

  SECCHI has also expressed interest in having Hinode to also join in the
  campaign (Hinode participation is TBC).

  The timing of this campaign is driven by the desire to conduct it when
  the STEREO spacecraft separation angle is in the range 7-10
  degrees. SECCHI has recently suggested May 7-20 (due to a change in
  STEREO/Behind's orbit), but that time period will overlap the initial
  days of the May SOHO keyhole (see section 1b), which might hamper EIT's
  ability to support. To avoid that overlap May 4-17 have been proposed
  instead. The separation angle on May 4 is 6.5 degrees (and is acceptable
  to SECCHI). Timing remains TBC, but is foreseen to be confirmed before
  beginning of February.

  EIT science planner for that period still TBD (for some months).  Simon
  can contact Kevin and Joe in the meantime.

  A JOP will very likely be written for this campaign by Simon Plunkett.

  Still TBD, if the shutterless run #27 on May 9 will be included.

* May 9, 16     EIT Shutterless #27, EIT/SECCHI (TBD),
                POC (SECCHI): William Thompson

  The shutterless campaign during the SECCHI campaign may be dropped unless
  there is SECCHI interest in our keeping the shutterless in the plan.

* Jun 13-17     MDI Continuous Contact

  Current default plan is full disk magnetograms and dopplergrams.  Timing

* Jul 18-22     MDI Continuous Contact

  Timing TBC.

b) Intercalibration activities

  Last Intercal 1: 10 January 2007

* Feb 5-9        ICAL01 (#7113), CDS/EIT, TBC

  Details and confirmation will be determined by the planners.

  EIT: ICALs are OK except during the weeks of shutterless.

c) Individual instrument plans


  See section 2a for MDI continuous contact periods.

  MDI may reduce the ALT cadence during Keyholes to be less than 15 ALT
  magnetograms per day if the lack of high rate telemetry is such that we
  will lose all or almost all of the 15 ALT Magnetograms each day.  The ALT
  cadence will be decided on an individual Keyhole basis and even a daily
  basis during each Keyhole depending on the 70 m antenna availability at
  the time.  MDI may also downlink select magnetograms in the 5 kbps
  telemetry if no 70 m passes are available at least every 2 days for Mag
  dump in the 160 kbps telemetry.

  All requests for MDI support need to be made several months ahead of time
  and sent to mdi-ops(at)mdisas.nascom.nasa.gov.  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 http://mdisas.nascom.nasa.gov/coordination.txt
  NOTE: Listing of a study on that page means *only* that a request has
  been received, not that it will necessarily be supported.

  A description of MDI Observing Modes most used for JOPs and campaigns (FD
  vs. HR) can be found at http://mdisas.nascom.nasa.gov/Collaborate.
  Anyone requesting MDI observations is encouraged to read this page in
  order to have a better idea of what observing modes would be best suited
  for a particular study.  More detailed information about how MDI
  operates, observational constraints and telemetry information can be
  found at http://mdisas.nascom.nasa.gov/MDI_Collaboration_Details.

  MDI is back in focus 5, best focus for full-disk observing.


  We have been using the LyA detector for some observations and will keep
  planning so when appropriate.

  Update on UVCS observing plans for February:

  Jan 29 - Feb 11 Observations of Polar Coronal Holes at 2-2.5 Rsun
  Feb 12-Feb 18   Instrument Calibrations/Obs. of 38 Aqr/Streamer Study
  Feb 19          Safe for keyhole
  Feb 20-Mar 6    No Observations during keyhole

  The current plan may be modified when we have a more definite information
  about the DSN schedule during the keyhole and the prediction for the star

  For weekly plans, see the SOHO calendar and the UVCS planning page:

  See also the Exceptional Ulysses Quadrature.


  For details see http://solar.bnsc.rl.ac.uk/scientificops/request.shtml.

  Joint observations with EIS and other Hinode instruments are top priority
  for CDS for the next several months, including through the period of
  SUMER/EIS campaign in Mar-Apr 2007.  Detailed plan TBD.

  Detailed plans of Hinode instruments are made available to CDS at a short
  notice, usually one day in advance.  This is not fully satisfactory but
  we understand that the Hinode team are very busy at this stage.  CDS
  planners respond as appropriate.  If SOHO SOCs have access to Hinode
  weekly plans, forwarding them to us would be appreciated.

  JOP 178 has been requested by Brigitte Schmieder for week starting 23
  April 2007, between 8-12 UT.


  EIT: 195 A CME watch plus synoptics at 6-hour cadence, as usual. Full-res
  CME watch whenever we're in submode 6.


  The SOHO/HINODE spring campaign is scheduled now from 1 April to 30
  April.  SUMER operations including test runs etc. will already start on
  22 March (submode change is tbc.)

  SUMER science planners for the campaign:

  22 Mar Germerott  (submode change tbc.)
  26 Mar Curdt      (preparation phase)
  02 Apr Tothova
  09 Apr Kucera
  16 Apr Teriaca    (operated from MEDOC, with local support at EOF)
  23 Apr Madjarska  (operated from MEDOC, with local support at EOF)

  SUMER is collecting proposals, existing JOPs can be reactivated and new
  studies can be submitted. Before acceptance any study will be critically
  rated by an evaluation board.  Priority will be given to SOHO/EIS
  collaborations. TRACE and STEREO/EUVI support as well as GBO
  co-observations (and self-evidently CDS, EIT, MDI) would be highly

  There are tentative plans for another SUMER campaign in October/November,
  details are TBD.


  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.


3. Any other business

* Next SPWG:

  Friday 23 February daily & weekly meetings

The rest are FYI items:

* If anyone has projects that require high rate (i.e. 1 minute 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.

* Future Mercury and Venus transits: SOC is requesting the Flight Dynamics
  Facility (FDF) to provide estimates and data for not only disk, but also
  for coronal transits.  For this purpose FDF needs a criterion
  (radial/angular distance from Solar disk centre) to define the coronal
  transits.  Currently FDF has been instructed to use
  SOHO/Sun/[Mercury,Venus] angle of (35 arcmin (from centre of Solar disk)
  as criterion.  Instrument teams are requested to provide the SOC with
  information on whether a larger angle is applicable.

* Hinode operational and planning information can be found from

* STEREO operational and planning information can be found via 
  http://stereo-ssc.nascom.nasa.gov/, more specifically from 

* The SOHO JOP/ICAL database and the web pages are in the process of
  becoming and being renamed "Solar" JOP/ICAL database and web pages. This
  is due to anticipated increased contributions by and collaborations as
  well as intercalibrations with STEREO and Hinode.

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Last modification: July 27, 2020

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