SOHO SPWG Minutes



SPWG FINAL MINUTES
Friday 28 April 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: http://soho.nascom.nasa.gov/soc/dsn/

* May 27-Jun 14 26 m Keyhole

  Tentatively VGM-only or VGMFL5-only. For details see below.

* May 31-Jun 11 34 m Keyhole

  Tentatively VGM-only or VGMFL5-only. For details see below.

* Aug 21-Sep 19 26 m Keyhole 

* Aug 28-Sep 13 34 m Keyhole

* Nov 24-Dec 11 26 m keyhole

* Nov 27-Dec 8  26 m keyhole

  Note: the keyhole plan for the June keyhole 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
  accomplished.  Similar approach is planned also for the Sep keyhole.

  All available keyhole information is at
  http://soho.nascom.nasa.gov/soc/keyholes.html


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.

  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.

- 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
  operations.


d) Instrument maintenance activities

- EIT Bakeout , times TBD


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), 
                EIT/TRACE/LASCO/UVCS,
                POC: Chris St Cyr (Chris.StCyr@nasa.gov)
* 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
  SUMER.

  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.


* Mar 22-May 21 MDI 60-day Continuous Contact

  Full disk Magnetograms/Dopplergrams.

  New Norcia will cover a few of the gaps (see below). For additional
  details, see the graphical DSN schedule.

  16 Apr 2006 (DOY 106) 05:25-06:05 UT
  30 Apr 2006 (DOY 120) 01:35-04:00 UT
  12 May 2006 (DOY 132) 00:15-00:40 UT
  20 May 2006 (DOY 140) 00:20-01:40 UT


* Jun 3-9   La Palma Observations, Facular irradiance characteristics
              Sunspot penumbral filament and/or light-bridge dynamics,
              MDI/TRACE/La Palma, 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 12-18 Ulysses-SOHO quadrature observations

  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.


* 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 26, Aug 2 EIT Shutterless #24, TBC


* Jul 22        STEREO launch, TBC


* 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, 
                  MDI/CDS/EIT/TRACE/THEMIS/GBOs,
                  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
   guaranteed.


* 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
  dopplergrams.


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

  Exact launch time is TBD, but most likely it will be 1720-2020
  UTC. This is an expanded repeat of 2005 Aug CELIAS/SEM calibration
  flight. 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.


* Oct 18,25     EIT Shutterless #25, TBC


* Oct 25-Nov 2  La Palma observations, Facular irradiance characteristics
                Sunspot penumbral filament and/or light-bridge dynamics,
                MDI/TRACE/SSO, POC: Tom Berger

  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.


b) Intercalibration activities

  Last Intercal 1: 27 Apr 2006

  - Week 21       ICAL01 (#7113), CDS/EIT, TBC

  Details and confirmation will be determined by the planners.


c) Individual instrument plans

MDI:

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@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 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
observations.


UVCS:

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:
http://cfa-www.harvard.edu/uvcs/observations/obst.html


CDS:

See their request diary for details:
  http://solar.bnsc.rl.ac.uk/scientificops/request.shtml


LASCO/EIT:


SUMER:


TRACE:

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 May 26 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
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.

* 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.