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


1. Boundary conditions

a) Orbit, attitude and manoeuvres

- SOHO is currently upside down

- manoeuvres

  Feb 27        stationkeeping and momentum management
  Mar 05        roll

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

  Aug 28        stationkeeping and momentum management
  Aug 30 or 31  roll (timing TBC)

b) Communications with the spacecraft

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

  DSN is currently planning the two-week period starting May 7 (weeks 19 
  and 20).

* 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

* Aug 12-Sep 9  26 m keyhole
* Aug 19-Sep 2  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 16-Apr 30 SUMER Campaign
* May 4-17      SOHO/STEREO Campaign, EIT/MDI/STEREO-EUVI, TBC
* 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.

   Bakeout for February keyhole is Feb 13-Mar 12.

e) Others

- TRACE eclipses

* Oct 5-Feb 22  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 active
  region 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.

* Mar 13-20     Joint polar study, CDS(TBC)/EIT(TBC)/LASCO(TBC)/UVCS/
                  Hinode/STEREO/TRACE (TBC), POC: Mari Paz Miralles

  This campaign will be similar to the one run in January 2007 (campaign
  number 7197).  Support is requested from CDS, LASCO and EIT. The POC has
  contacted Hinode, and will soon contact STEREO, TRACE, LASCO and EIT
  about the campaign.  An update will be sent as soon as we have it.

  Note and as a constraint to-be-taken into account: submode change from 6
  to 5 is scheduled for Mar 16 (TBC) due to onset of SUMER's preparations
  for the Apr 1-30 campaign.

* Mar 16-31     SUMER technical ops in preparation for the Apr 1-30 campaign

  Submode change is scheduled for 16 Mar (timing TBC).

* Mar 30-Apr 2  MDI Continuous Contact

  Current default plan is full-disk magnetograms and dopplergrams.

* Apr 01-27/30  SOHO/Hinode Campaign,
                  POC: Werner Curdt, Karine Bocchialini (MEDOC)
  SUMER is collecting proposals. 

  Presently it looks like the campaign can end on 27 April, unless special
  observations come up that require the time from 28 to 30 April.

  SUMER operations will begin with testing and preparations 16-31 Apr (see
  above).  Science operations will be conducted from GSFC/EOF 1-15 Apr and
  from MEDOC with support at GSFC/EOF 16-27/30 Apr.  Submode change is
  scheduled for 16 Mar (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.

  TRACE and STEREO-EUVI have also been included. TRACE will collaborate.

* Apr 16-27/30  SOHO/Hinode Campaign - MEDOC campaign 17,
                  SUMER/MEDOC, POC: Karine Bocchialini

  MEDOC supports SUMER during part of the SOHO/Hinode campaign. This
  support is internally identified as MEDOC campaign 17. See also above and
  section 2c/SUMER.

* Apr 23-29     JOP178 Filament and its Environment, TBC
                  THEMIS/SST/VTT/TRACE/SOHO/Hinode (all TBC), 
                  POC: Brigitte Schmieder

  MDI has been requested to participate and barring any conflicts with our
  Apr 25-29 continuous contact period, MDI should be able to support

* Apr 26-29     MDI Continuous Contact

  Current default plan is full disk magnetograms and dopplergrams (TBD).

* May 04-May 17 SOHO/STEREO Campaign, EIT/STEREO-EUVI/MDI, 
                  POC: William Thompson, TBC

  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.

  MDI has also been asked to participate in this coordination for 4-17 May.
  They have asked for full disk, 1 minute cadence Magnetograms or high
  resolution, 1 minute cadence Magnetograms and Continuum images.  MDI can
  support either 4-17 May or 7-18 May (keep in mind a Keyhole starts 18

* May 7-13      Exceptional Ulysses Quadrature/Coordinated observations 
                  with radio scintillation measurements, 
                  UVCS/Ulysses/MERLIN, POC: Giannina Poletto

  Support from LASCO/EIT or STEREO may be solicited.

  For additional and more detailed information on the quadrature, see also
  section 2c/UVCS.

* May 9, 16     EIT Shutterless #27, EIT/STEREO-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.

* May 14-20     Exceptional Ulysses Quadrature/Ulysses-SOHO Quadrature
                   together with Hinode, UVCS/CDS/Ulysses/Hinode(TBC),
                   POCs: Giannina Poletto, Guilio Del Zanna

  Support from LASCO/EIT or STEREO may be solicited.

  The Hinode proposal for this campaign has been submitted and we are
  waiting for the Hinode response.

  For additional and more detailed information on the quadrature, see also
  section 2c/UVCS.

* Jun 13-17     MDI Continuous Contact, TBC

  Current default plan is full disk magnetograms and dopplergrams.  Timing

* Jul 18-22     MDI Continuous Contact, TBC

  Default plan TBD.

* Aug 27-Oct 14 JOP178 Filament and its Environment, TBC
                  THEMIS/SST/VTT/TRACE/SOHO/Hinode (all TBC),
                  POC: Brigitte Schmieder
  MDI cannot support JOP178 in August or the beginning of September due to
  a SOHO keyhole (minimal support *might* be possible depending on the
  availability of 34m and 70m).  However, after the keyhole, MDI will start
  it's yearly 60 day Continuous Contact period and can only provide full
  disk, 1 minute cadence Magnetograms and Dopplergrams for JOP178. 

b) Intercalibration activities

  Last Intercal 1: 9 February 2007

* Mar 13-15       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.


  UVCS has the following plans in March:
    Mar 01-11      Safe for keyhole
    Mar 12         Recovery from keyhole
    Mar 13-20      Joint SOHO/Hinode/STEREO/TRACE polar study
    Mar 21-Apr 04  South coronal hole observations

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

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

  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.


  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.

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


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

  Feb 13-Mar 12 EIT Bakeout


  The SOHO/HINODE spring campaign (see also section 2a) is scheduled now
  from 1 April to 30 April.  SUMER operations including test runs etc.
  will already start on 16 March (submode change is scheduled for that
  date, but timing is TBC.)

  SUMER science planners for the campaign:

  22 Mar Germerott  
  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 after 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 now the 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.

* To provide more unambiguous identification, individual instruments on
  board spacecraft other than SOHO will be as of this SPWG be referred to
  with notation SPACECRAFT-INSTRUMENT, for example Hinode-EIS.

 * The Project Scientist has decided that submission of the Inputs to the
  Activity Plan (IAPs) will change to be voluntary.  The PS has informed
  the SOHO community of the change on 22 Feb by e-mail.

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