Friday 26 May 2006

1. Boundary conditions

a) Orbit, attitude and manoeuvres

- SOHO is currently right side up

- manoeuvres

  Jun 6  roll, stationkeeping and momentum management

  Sep 5  stationkeeping and momentum management; roll date
         separate and TBC (timing TBC)

  Dec 5  roll, stationkeeping and momentum management (timing TBC)

b) Communications with the spacecraft

- Graphical DSN schedule:

* May 27-Jun 14 26 m Keyhole

  2006/05/27-2006/06/01 ALL
  2006/06/01-2006/06/02 VGMFL5
  2006/06/02-2006/06/03 VGM
  2006/06/03-2006/06/06 VGMFL5
  2006/06/06-2006/06/07 VGM
  2006/06/07-2006/06/10 VGMFL5
  2006/06/10-2006/06/14 ALL

  For details see below.

* May 31-Jun 11 34 m Keyhole

  General outline see above. For details see below.

* Aug 21-Sep 19 26 m Keyhole 

* Aug 28-Sep 13 34 m Keyhole

  Note: the keyhole plans for the June and September keyholes will be
  based on VGM-only or VGMFL5-only to reduce FOT manpower requirements
  needed for complex operations during the keyhole.  This will allow
  the FOT personnel to devote more time on the development of future
  more automated operations.  The tradeoff is some less science

  Note: outlook for the Sep keyhole is bleak due to severe contention
  between several missions for DSN 70 m station resources. More
  information on the availability of those resources for SOHO is
  expected in early June.

* Nov 24-Dec 11 26 m keyhole

* Nov 27-Dec 8  34 m keyhole

  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
* May 27-Jun 14 26 m Keyhole (May 31-Jun 11 34 m Keyhole), SM5/6
* Jul 26,Aug 2  EIT Shutterless #24, SM6, TBC
* Aug 21-Sep 19 26 m Keyhole (Aug 28-Sep 13 34 m Keyhole), SM5/6
* Oct 18,25     EIT Shutterless #25, SM6, TBC
* Nov 1-Dec 15  SUMER Campaign, SM5, TBC
* Nov 8         Transit of Mercury, SM5/6
* Nov 24-Dec 11 26 m Keyhole (Nov 27-Dec 08 34 m Keyhole), SM5/6

- 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.

- SUMER plans an engineering campaign in November around the detector
  A problem (there are indications that higher temperatures reverse
  the defects).  Details TBD. Limited time will also be given to
  science operations with detector A. In case of no delays in the
  Solar-B schedule we will extend the campaign and start with
  supporting science observations.  Details TBD.

- EIT will probably be supporting JOP 159 only in the week or two before
  keyholes, at least as a test.

- According to EIT the Mercury transit observations can be carried out
  in either submode 5 or 6. FDF has been contacted to get the
  observational geometry and initial reply has been received (section

- 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, 2006 June keyhole
  - Prebake cals, long set: 2006/05/26 DSS-46 21:15-05:15 UT
  - In bake 2006/05/27 02:00 UT
  - Out bake 2006/06/15 08:00 UT
  - Post bake cal set 2006/06/15 DSS-27 16:00-00:40 UT
  - Observations resume 6/16 01:00 UT

e) Others

- TRACE eclipses

  TRACE is in its normal operations mode until the next 'eclipse
  season', which is estimated to start on 2 Oct 2006 (doy 275) and
  last through to 13 Apr 2007 (doy 103).

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
* 2002/04/25--  JOP159 CMEs in Lyman-alpha (#6870), SWAN/LASCO/EIT/UVCS,
                POC: Chris St Cyr, Eric Quemerais
* 2003/05/13--  Default CDS Co-observations with TRACE (#6950)
* 2003/07/01--  Network-Internetwork Oscillations (#7033), EIT/TRACE,
                POC: Scott McIntosh
* 2004/02/19--  JOP175 Extended Filaments at the Limb (#7135), 
                POC: Chris St Cyr (
* 2005/09/20--  JOP153/MMOP003 Future Major Flare Watch (#8006)

  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  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.  As long as the S/C 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

  The question of whether or not to continue campaign #7033 (Network-
  Internetwork Oscillations) has been brought up, and the issue of how to
  list a possible "final, long run" has been raised.  If that run will
  involve a significant change to the existing campaign, e.g. by including
  Solar-B instruments, it should be a separate item (and the current
  campaign can be closed).  If not, the campaign can be continued until the
  final run has been done, to keep things simple by using the existing
  campaign number.  The INO study has been removed from the TRACE calendar
  until an explicit request is made.  SOC is contacting Scott McIntosh on
  the subject of continuation of campaign #7033.

* May 19-Jun 02 JOP173 3D Structure and Dynamics of Sunspots (#7181), 
                  POC: Karin Muglach (muglach(at)

* Jun 3-9   Facular Irradiance Characteristics, MDI/TRACE/SSO,
                  POC: Tom Berger, TBC

  Obervation time 08-18 UTC. MDI will try to support this run, but due
  to the keyhole support will be limited.

  TRACE will support this observation and a program has been defined.

* Jun 8-18 Ulysses-SOHO quadrature observations, UVCS/Ulysses, 
                  POC: Giannina Poletto

  UVCS team is looking into the possibility of starting the quadrature
  observations earlier than Jun 12. Since part of this campaign is
  during the June keyhole, as much data coverage as possible for UVCS
  is preferred. See also section 1b.

* Jun 28-Jul 12 JOP171 Solar Network Variability and Dynamics, 
                  CDS/EIT/MDI/TRACE/DOT, POC: Peter Gomory

  CDS has worked out the details with Peter already.

  EIT sees no problems supporting the request.

  MDI will likely support the request, tentatively taking 1-min cadence
  high-res magnetograms, dopplergrams and filtergrams.

  TRACE will support this observation and a program has been defined.

* Jul 12-16     MDI Continuous Contact

  The default plan is high resolution magnetograms, dopplergrams and
  filtergrams, but it's subject to change based on solar activity and
  general requests for MDI observations.  We may continue with
  whatever we run for JOP171.

* Jul 13-Aug 19 JOP186 Atmospheric Seismology, CDS/EIT/MDI/TRACE/DST,
                  POC: Mike Marsh

  Proposed observing schedule: 2-week period between Jul 13-Aug
  19. TBC - SOC are confirming the timing of the period.

  EIT will run CME watch in 171  to support.

  MDI will try to do 1-min cadence, high-resolution magnetograms,
  dopplergrams and filtergrams if target is within the high-resolution
  field-of-view.  Otherwise, 1-min full-disk magnetograms and dopplergrams.
  MDI has also received a request for high-resolution magnetograms and
  continuum images from Vicente Domingo (a coordination with SST) for 27
  July through 08 August.  MDI will try to support both studies, but might
  stick with high resolution for the SST coordination even if JOP186
  requests full-disk magnetograms.

  TRACE has a defined program.

  CDS is negotiating study duration and other details.

* Jul 22        Stereo Launch, TBC

* Jul 26, Aug 2 EIT Shutterless #24, TBC

  Wednesday July 26, 2006 DSS-27 18:00-20:40 UT
  Wednesday August 2, 2006 DSS-27 18:00-20:40 UT

* Jul 27-Aug 08 La Palma observations, Small magnetic features and their
                  radiative counterparts, MDI/SST, POC: Vicente Domingo

  See above response for JOP186.  MDI will coordinate observations for both
  studies.  At MDI's request improved DSN coverage has also been requested
  for 07:30-20:00 UT each day. The outcome of the request is TBD.

* Aug 16-20     MDI Continuous Contact

  The default plan is high-resolution magnetograms and dopplergrams.

* Aug 25-Sep 3  JOP178/JOP157 Filament and its Environment, 
                  POC: Brigitte Schmieder,TBC

  Overlaps with the September keyhole. MDI will try to support this
  for the first couple of days, but after that, no support is

  EIT will run CME watch in 304  August 25 - start of bakeout (TBD).

  TRACE will support.

* Sep 23        Solar B launch, TBC

* Sep 27-Oct 6  La Palma observations, Propagation of low frequency
                  waves & spicule formation, MDI/TRACE/SSO, 
                  POC: Bart DePontieu

  MDI has requested extra DSN coverage for 08-18 UTC. Default plan is
  high resolution magnetograms, dopplergrams and filtergrams (or some
  combination of the three).

  TRACE is supporting this request (TBC).

* Oct 11-15     MDI Continuous Contact

  No plans yet, default plan is full-disk magnetograms and

* Oct 18,25     EIT Shutterless #25, TBC

  Shutterless #25 still TBC. DSN schedule for SOHO is still in works for
  this period.

* Oct 24        Dual sounding rocket launch for CELIAS/SEM, TIMED/SEE
                  and SDO/EVE cross-calibration, CELIAS/TRACE/TIMED/SDO,
                  POC: Andrew Jones, TBC

  This is an expanded repeat of 2005 Aug CELIAS/SEM calibration flight.
  Exact launch time is TBD, but most likely it will be 1720-2020 UTC. The
  exact timing is dependent on the TIMED orbit, and that will not be
  finally determined until about 8-10 weeks before launch.  Backup launch
  date is between 7-27 Feb 2007.  Request is for going to record for
  approximately 10 min even if SOHO is in contact.  MDI is OK with going to
  record for 10 min.

  TRACE would like to participate and has contacted the POC.

  CDS would like to know the details of the calibration rocket instrument
  (wavelengths, field of view, etc.).  Will join if useful for CDS
  calibration.  SOC has requested and obtained more detailed information on
  the payloads, it (or a link thereto) will be disseminated to supporting
  instrument teams probably by early June.

* Oct 25-Nov 2  Facular Irradiance Characteristics: Sunspot Penumbral 
                  Filament and/or Light-Bridge Dynamics, MDI/TRACE/SSO, 
                  POC: Tom Berger, TBC

  MDI has requested extra DSN coverage for 08-18 UTC. Default plan is
  high resolution magnetograms, dopplergrams and filtergrams (or some
  combination of the three).

  TRACE supports this request.

* Nov 1-Dec 15  SUMER Campaign

  See section 1c.

* Nov 8         Mercury Transit

  SOHO visibility information received from FDF: "The Mercury transit
  in November will be seen by SOHO.  The angular radius of the Sun as
  seen from SOHO will be 0.27137 deg, the lowest SOHO/Sun/Mercury angle
  will be 0.1153 deg.  The transit midpoint will occur on
  20061108.223648.696 and the transit will be ~5 h, starting ~2.5 h
  before the midpoint and ending ~2.5 h after the midpoint.  FDF is
  currently refining the duration and will provide a final analysis
  within the next couple of weeks.  Please note that all the above
  information is from the aspect as seen from SOHO."

  For summary information on the view from Earth, see

  EIT will observe the transit.

  LASCO to observe Mercury through C3 and C2 fields.  TBC.

  MDI can observe the transit and requests SOHO not to be in record.

  TRACE will be supporting with observation for Jay Pasachoff. The
  transit occurs, however, during TRACE's eclipse season (see section
  1e), hence support will depend on the exact timing and possible
  coincidence of the transit and a TRACE eclipse.

  CDS will consider transit observations.

  The SOCs have contacted to DSN to ensure that SOHO is in contact during
  the transit, i.e., that SOHO has a baseline and backup DSN stations

* Nov 8-12      MDI Continuous Contact

  Default plan is 1-min cadence, full disk magnetograms and dopplergrams.

b) Intercalibration activities

  Last Intercal 1: 25 May 2006

  - Week 25       ICAL01 (#7113), CDS/EIT, TBC

  Details and confirmation will be determined by the planners.

  Future ICALs are TBD. EIT: ICALs are OK except during the weeks of
  shutterless or of the Mercury transit.

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.

All requests for MDI support need to be made several months ahead of
time and sent to mdi-ops(at) 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.

A description of MDI Observing Modes most used for JOPs and campaigns
(FD vs. HR) can be found at
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

MDI is back in best focus for Full Disk observing and may switch to
better high-resolution observation focus after the June keyhole, in
preparation for late summer/early fall timeframe requests for high-res


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

UVCS will recover from the keyhole on June 7.

Other observations in June are:
June 15         Helium focusing cone observations
June 14-16      Annual Observations of Zeta Tau
June 19-July 2  North Polar Coronal Hole Study

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


See their request diary for details:


LASCO reduced exposure for Mercury pre and post the transit.  TBC.


See section 1c.


TRACE is in its normal operations mode until the next 'eclipse
season' (for estimated dates see section 1e).

NASA has announced that it plans to continue funding of TRACE
operations at close to the FY06 level through FY08, followed by a
significant ramping down of operations into FY09.

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. AOB

* Next SPWG:

Fri June 23 after the 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

* 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.

* Solar-B launch is currently scheduled for 23 Sep 2006. Science
observations (including some MDI, TRACE and possibly STEREO
collaborations) are tentatively scheduled to begin approximately 45 d
thereafter. Spacecraft and launch site scheduling issues may push the
launch from Sep to Nov-Dec time frame.

* STEREO launch is currently scheduled for 22 Jul 2006. Coordinated
observations between Stereo and SOHO seem feasible approximately 120 d
after Stereo launch (TBC). Information will be provided as soon as it
becomes available. Simon Plunkett at NRL should be the contact for
STEREO JOPs; the other three instruments are pretty much on or off

* Future Mercury and Venus transits: SOC is requesting the 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 transits. Instrument
teams are requested to provide SOC with information on what is a
reasonable criterion for each instrument.