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


1. Boundary conditions

a) Orbit, attitude and manoeuvres

- SOHO is in upside down roll position (180 deg).

- manoeuvres

  To the degree possible, manoeuvres take place during the last days of
  34-m keyholes.  Currently proposed or set manoeuvre dates are:

  Aug 21 (TBC)  station-keeping, momentum management, roll
  Aug 22 (TBC)	manoeuvre backup date

  Nov DD (TBC)  station-keeping, momentum management, roll; tentative dates are 
                 Nov 11, 18 or 19

b) Communications with the spacecraft

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

  Keyhole dates for the next 6 months (All available keyhole information is
  at or via http://soho.nascom.nasa.gov/soc/keyholes.html):

* Aug 01-30     26m Keyhole
* Aug 08-22     34m Keyhole

* Nov 05-22     26m Keyhole
* Nov 09-18     34m Keyhole

* Jan 25-Feb 21 26m Keyhole
* Feb 1-14      34m Keyhole

- DSN D45 and D65 (34-m) antennae status

  D45 and D65 are currently down-link/telemetry-only, but are being
  upgraded with up-link/commanding capabilities.  The estimated time for
  the upgrade to be operational is at the end of July.

- End-of-pass handling during MDI continuous contact periods

  To avoid problems with transmitter masks at the end of passes during MDI
  continuous, DSN has requested we bring the carrier down 30 min before the
  end of pass.  As a result, the last 30 min of all MDI continuous contacts
  will be TM only.  For ranging passes, the spacecraft will be transitioned
  to record ~1 h before the end of the pass.  The station will drop the
  carrier and re-sweep into receiver 2.  The spacecraft will then be
  transitioned back to VC2 and VC3.

c) KNOWN submode (SM) dependent activities/submode changes:

* TOO           JOP153/MMOP003 Future Major Flare Watch (SM5 if SUMER
                observes target, SM6 otherwise)
* Jul 23,30     EIT Shutterless #32 TBC (SM6)
* Nov           SUMER campaign TBD (SM5)

  SUMER campaign dates may overlap with keyholes. Such overlaps shall be
  scheduled only if periods of no SUMER data between passes are acceptable.

  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.

  SUMER says there is no decision yet, but November campaign is unlikely to

  For EIT Shutterless #32 times see section 2a.

d) Instrument maintenance activities

  EIT bake-out periods will be during keyholes.  August bake-out not
  defined at this time, but will be very soon.

e) Others

  TRACE summer eclipse season began on 10 May 2008 and according to latest
  predicts will end on 22 Jul 2008.  The next eclipse season will begin on
  10 Sep 2008. There is no predicted end for that eclipse season.

  Attended automated daytime passes will begin during the week starting Mon
  16 Jun. Unattended daytime automation will begin 1 October.

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)
* 2005/09/20--  JOP153/MMOP003 Future Major Flare Watch (#8008)
* 2007/03/20--  Default CDS/Hinode-EIS co-observations (#7200)

  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. It is
  clear that STEREO-EUVI provides adequate "context" information for RHESSI
  flare observations. Routine EIT submode and resolution switches are
  probably no longer needed.

* Jul 23,30     EIT Shutterless #32,
                  POC: Susanna Parenti

  The DSN schedule for the shutterless dates is confirmed.

  EIT Shutterless #32 times as follows:
  July 23, 2008: DSS-27 19:50-02:30 UT, run-time 21:00-23:50 UT (automation)
  July 30, 2008  DSS-27 14:40-21:40 UT, run-time 17:00-19:50 UT

* Aug 01        Total Solar eclipse (Northern hemisphere), 9:21-11:21 UT,
                  POC: Serge Koutchmy, Jay Pasachoff, Alphonse Sterling
                  POC: Alan Hale

  During this eclipse SOHO has just entered the Aug 2008 keyhole period and
  will not be in contact with ground station until 14:35 UT (3 h 14 min
  after the end of the eclipse). The observational data from the duration
  of the eclipse will not be completely down-linked until approximately
  17:30 UT. The DSN scheduler will keep an eye on possible additional DSN
  time during the eclipse.

  Several expeditions and other ground-based observations of the eclipse
  have been planned. SOHO-related eclipse web pages including information
  about the eclipse as well as observations by SOHO instruments and other
  spacecraft are at http://sohowww.nascom.nasa.gov/soc/eclipse-2008-08-01/.

  EIT/LASCO eclipse support requests and program details:

  Alan Hale: C2 C3 white light images at synoptic cadence for possible
  comet detection in the field of view with STEREO.

  Serge Koutchmy: totality 10:50-10:52 UT
	EIT 195A at totality (10:51UT), EIT 4 polarizer sets before (02:12
	UT) and after (14:48 UT).  C2 full field closest to totality 
	(synoptic cadence)

  Jay Pasachoff: totality 10:44-10:46 UT
	EIT 195A at totality (10:45 UT), C2 C3 full field image white
	light close as possible (synoptic cadence)

  C2 polarized set prior (09:54 UT), post (11:54 UT)
  C3 polarized set prior (08:42 UT), post (12:42 UT)
  EIT 4 wl synoptic set prior (02:12 UT), post (14:48 UT)
  C2,C3, EIT 195A synoptic program outside of the requested eclipse support. 

  TRACE is observing the eclipse in coordination with Hinode in support of
  Alphonse Sterling's observations.

* Sep 24-28     MDI Continuous Contact

  Note "End-of-pass handling during MDI continuous contact periods" in
  section 1b.
  We may do high resolution observations for Helioseismology.  Observables
  will be high resolution magnetograms, dopplergrams and filtergrams at
  1-min cadence.  FOV is TBD.

* Oct 16-20     MDI Continuous Contact

  Note "End-of-pass handling during MDI continuous contact periods" in
  section 1b.

  We may do high resolution observations for Helioseismology.  Observables
  will be high resolution magnetograms, dopplergrams and filtergrams at
  1-min cadence.  FOV is TBD.

* Oct 16, 28    EIT shutterless #33,
                  POC: Susanna Parenti

  DSN passes (and hence exact times) still TBC.

* Nov TBD       SUMER/Hinode campaign

  SUMER says there is no decision yet, but the November campaign is
  unlikely to happen.

* Dec 10-14     MDI Continuous Contact

  Note "End-of-pass handling during MDI continuous contact periods" in
  section 1b.
  Standard full disk, 1-min cadence magnetograms and dopplergrams.

  May do high-resolution helioseismology, particularly if we do not have a
  5-day continuous contact in October and there is sufficient interest in
  MDI doing HR observations (or something really interesting in the MDI

* Jan 15, 22    EIT shutterless #34,
                  POC: Susanna Parenti

  DSN passes (and hence exact times) still TBC.

* Jan-Apr (TBD) JOP 214 Quiescent prominence structure and dynamics with 
                  Hinode and La Palma,
                  SUMER/Hinode-EIS/Hinode-SOT/Hinode-XRT/DOT/SST, TBC. 
                  POC: Tom Berger

b) Intercalibration activities

  Last ICAL was: Jul 16

  ICALs are normally performed monthly. Below is a SOC proposal for ICAL
  weeks for the next six months.

* Aug 4-8       ICAL01 (#7113), CDS/EIT/Hinode-EIS/Hinode-SOT/STEREO

* Sep 1-5       ICAL01 (#7113), CDS/EIT/Hinode-EIS/Hinode-SOT/STEREO

* Oct 6-10      ICAL01 (#7113), CDS/EIT/Hinode-EIS/Hinode-SOT/STEREO

* Nov 3-7       ICAL01 (#7113), CDS/EIT/Hinode-EIS/Hinode-SOT/STEREO

* Dec 1-5       ICAL01 (#7113), CDS/EIT/Hinode-EIS/Hinode-SOT/STEREO

* Jan 5-9       ICAL01 (#7113), CDS/EIT/Hinode-EIS/Hinode-SOT/STEREO

  Proposed compiled ICAL scheduling criteria, constraints and guidelines
  (see also campaign #7113):

  1) EIT/CDS are the primary participating instruments

  2) CDS: Hinode-EIS participation is extremely important and participation
     is to be attempted within the limitations of the constrained Hinode
     operations (see "FYI items" in section 3). Hinode-SOT has also
     expressed interest in participating.

  3) STEREO-EUVI observations are included when possible. ICALs are
     attempted to be scheduled not to coincide with STEREO manoeuvres or
     other interruptions in observations (see

  4) EIT: ICALs OK at all other times except the weeks of shutterless

  5) Dates, details and confirmation will be determined by the planners
     with support from the SOHO SOCs.

  CDS okay. If Hinode-EIS can suggest convenient date & time, CDS can usually

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 down-link 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 in Focus 5 for best focus for FD observing.


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


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


  EIT: 195 A CME watch plus synoptics at 6-hour cadence, as usual. Full-res
  CME watch whenever we're in submode 6. Hope never to change until the
  Bogart mission.


  See section 2a for details.


  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.

  For TRACE summer eclipse season see section 1e.

3. Any other business

* Tentative SPWG meeting times for next six months (only the next one will
  be decided in this meeting). Meetings take place as a baseline on Fridays
  after the daily and weekly meetings.

  Aug 28 (Thursday, due to the subsequent weekend being a holiday weekend)
  Sep 26
  Oct 24
  Nov 21
  Dec 19
  Jan 23

The rest are FYI items:

* Hinode is currently experiencing technical difficulties that have
  resulted in a reduction in the rate at which scientific data can be
  transmitted to the ground from the on-board recorder. According to the
  Hinode Science Working Group "The problem will have a significant impact
  on how the Hinode mission is operated." For further details see

* In the future SOHO's DSN contacts will grow shorter as we lose 26-m
  antenna support and other, new missions get higher priority. The
  instrument teams are therefore requested to look at the NRT commanding
  that is done (especially for emergencies and recoveries) and see what can
  be converted into TSTOLs that the FOT can run (even without explicit
  instrument or SOC direction).

* MDI high-rate support requests: no change, see URL

* DSN support requests: preferably 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: no change, see URL

* Hinode operational and planning information and guidelines: no change,
  see URL http://sohowww.nascom.nasa.gov/operations/SPWG/spwg-20080118.html
  and http://sohowww.nascom.nasa.gov/soc/JOPs/jop-submit.html

* STEREO operational and planning information: no change, see URL

* 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.

* New JOP vs. modified existing JOP rules-of-thumb: no change, see URL

* SOHO calendar email notifications: no change, see URL

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