SOHO SPWG Final Minutes April 25, 2003

Status Report From: Goddard Space Flight Center
Posted: Wednesday, May 14, 2003

1. Boundary conditions

* The next maneuver is tentatively scheduled for June 11, with the following fuel estimates: 0.3325 (Station keeping) + 0.0157 (Momentum management). Total usage: 0.3482 kg.

* TRACE may experience a minor episode of atmospheric absorption near solstice.

* MDI continuous contacts:

Apr 23-27 MDI Continuous Contact

Jun 18-22 MDI Continuous Contact

Jul 23-28 MDI Continuous Contact

Sep 3-7 MDI Continuous Contact

Sep 22-Nov 23 MDI 60-Day Continuous Contact (see note at end of section)

* May 7 Mercury transit, CDS/MDI/EIT/TRACE, POC: Stein Haugan

Since MDI will observe during the transit, we cannot use the SSR. The page at has been updated with new information from Flight Dynamics.

We discussed contingencies related to loss of contact (including risk of such, due to high winds) and degraded data:

CDS will run "normal" science studies, so no special precautions needed.

EIT wants to abort their sequence before any loss of contact due to the risk of a sector wheel hang. For this reason, we will ask to have the NRT link whenever it is not needed by the FOT.

NOTE: EIT's wish to abort before going to record may slightly increase the risk of not making it to record. Thus, there will be a SLIGHTLY HIGHER THAN USUAL CHANCE FOR TOTAL DATA LOSS for everyone during the entire D66 pass (05:50-16:05). We hope everyone can live with this, and not schedule any critical observations during the event (SOCs are not aware of any such plans).

For imminent loss of contact, MDI wants to use the (shorter) "emergency record" procedure, as late as possible. They also want to modify the normal steps taken to recover from an emergency record session, to shorten the dropout. For MDI, it is crucial to get one-half of the full transit; the other half is still important, but a little less so.

In case of degraded data (e.g. RFI): Obviously, if the data received on the ground is useless to MDI, we will go to record. If the data is degraded but still useful enough for MDI, we will not go to record. MDI, LASCO, SOCs and Project Scientists will be represented to make the decision based on a real-time evaluation of the data.

* Submodes:

Submode 6 except for these submode 5 periods:

Apr 4 - May 6 SUMER campaign - back to SM 6 at 19 UT May 16-30 MEDOC campaign #11 Submode changes: 6->5 on May 16 (12 UT) 5->6 May 30 (19 UT)

* EIT Bakeout/CalRock/Shutterless/Other:

* Apr 19-22 EIT Bakeout

* May 26-Jun 1 EIT CME Watch in 304 ?

* Jun 20,26 EIT Shutterless Run Segment 1&2, TBC

* Jul 2 EIT Shutterless Backup, TBC

* Jul 3-7 EIT Bakeout (tentative)

* August EIT Calibration Rocket (TBC), POC: Jeff Newmark

* Sep 3,10,17 EIT Shutterless #12, TBC

* Sep 18-22 EIT Bakeout (tentative)

* Nov 26 EIT Shutterless #13, Segment 1, TBC

* Dec 3,10 EIT Shutterless #13, TBC

* Commanding outlook: See AOB section.

* Long-term DSN outlook: November 1, 2003 - March 1, 2004 is a very heavily subscribed time for DSN. We may see some less contact time than we are used to (but we hope that the 60-day continuous goes well!). MDI *really* hopes so.

Note: There is a chance the 60-day continuous will be shifted somewhat earlier due to this.

2. Priorities for the coming month & more

a) Joint observing plans and campaigns

* Apr 18-May 6 JOP104 Doppler Shifts in X-ray Jets, SUMER/RHESSI/EIT/TRACE(Apr 18-20, May 5-6)/UVCS(May 1-6), POC: Bernhard Kliem & Werner Curdt

* Apr 21-May 4 JOP083 High Cadence Activity Studies and the Heating of Coronal Loops, CDS/EIT/TRACE/MDI, POC: Jack Ireland and Ineke De Moortel

SUMER: JOP 104 out-of-limb Doppler oscillation studies will be run during times when JOP 161 and noble gas study are done or don't have a suitable target.

TRACE can support JOP104 on Apr 18-20, May 5-6, and at other times depending on requirements and plans for JOP083. CDS also notes that they are committed to JOP083.

MDI will try to coordinate with JOP083 as long as the observations do not conflict with the April 5-Day CC (Apr 23-27) plan.

UVCS will support JOP104 during May 1-6, if a suitable target is near the limb.

EIT will provide the full-res, full-frame images required for JOP 083, by moving synoptic observation times if necessary.

* May 5-11 Quiet Sun Study, CDS/Sac Peak, POC: James McAteer & Peter Gallagher

* May 7 Mercury Transit, CDS/MDI/EIT/TRACE, POC: Stein Haugan,

A web page with information for the public (including brief explanations of the observations) is available at

* May 8-24 AR Studies, TRACE/La Palma SST/MDI/[CDS], 08-18 UT, POC: Tom Berger

* May 25-Jun 7 Quiet Sun Studies, TRACE/La Palma SST/MDI/[CDS], 08-18 UT POC: Mats Carlsson

* Jun 8-Jun 22 Spicules, Mottles and Jets, TRACE/La Palma SST/MDI/[CDS] 08-18 UT, POC: Bart DePontieu

These three are referred to as the TRACE/La Palma coordination (or simply "this campaign) below.

General details: Primary target will be ARs, baseline is to follow regions across the disk, preferably those traversing the MDI high-res FOV, with high cadence cut-outs when possible. The SST will have the SOUP filter for H-alpha scans, and may also observe in G-band, continuum close to G-band or Ca II K (TBD). Observing time is typically 08-18 UT, best seeing 08-12 UT and 16-18 UT.

MDI request for May 8-24 time period: High res magnetograms.

MDI request for May 25-June 7 period: 3-variable high res campaign.

Some details for the June 8-22 time period: Studying spicules, mottles and jets in AR & Quiet Sun. Target: AR plage with quieter enhanced network within reach of FOV, ideally containing compact hot loops & opposite polarity plage. TRACE request is various combinations of C IV, 171, 195, 1600, with 512x512 FOV. MDI request is for mags and Doppler in high-res FOV, 1 min cadence.

TRACE is committed to supporting this campaign. Any other requests (e.g. JOP163, JOP157) in this time frame have second priority; no support unless they go with the La Palma target.

EIT's understanding is that this is a high-res program and EIT is not really of interest to the observers.

CDS will run their own studies on the same target that will be complemented by the TRACE/La Palma observations.

MDI will support the TRACE/La Palma SST studies. They will also do their best to coordinate with JOP163 during MEDOC, the Blinkers Study (in May) and JOP165.

* May 19-Jun 1 MEDOC Campaign #11

See their calendar for details:

SUMER on/off & submode change dates/times - see Section 1.

IN ADDITION, we have the following comments and calendar items:

TRACE is committed to the La Palma SST collaboration, see TRACE note under that item, above.

* May 24-28 Blinker Study (May 24-28 OR Jun 9-17), La Palma DOT/MDI(TBC)/CDS(TBC), POC: Hardi Peter

* Jun 9-17 Blinker Study (May 24-28 OR Jun 9-17), La Palma DOT/MDI/CDS , POC: Hardi Peter

CDS will support the Blinker Study. The second time slot - in June - has been suggested. If the study runs during the MEDOC campaign, it is up to the JOP leaders to negotiate the observing time with other MEDOC participants.

MDI prefers the May slot for the Blinker Study - they have a QS La Palma coordination at that time, so joint observations are feasible. For the June slot, MDI can not participate.

EIT will be doing a 304? half-res CME Watch and synoptics for the 2nd week to support JOP124 (and JOP157, which includes, but does not specify, EIT observations).

UVCS has a conflict w/JOP 158 May 24-27. We are not able to run this JOP since we already have Ulysses-SOHO quadrature study scheduled for these two weeks.

JOP167 was submitted the day before the SPWG, to be run during MEDOC (the study was already listed on their calendar). The contents of the JOP was not discussed.

* Jul 15-18 JOP166 Oscillations in Coronal Bright Points (TBC), CDS/MDI/TRACE/EIT, POC: Gerry Doyle

TRACE has agreed to this JOP and this timeframe.

* Sep 3-17 JOP165 High Cadence Active Region Oscillations: Center to limb variation (TBC), CDS/MDI/EIT/TRACE/SPIRIT, POC: Dipankar Banerjee (

Note: This has been tentatively rescheduled for the September shutterless campaign (from June). Instruments have not had time to decide whether they can support it. NOTE: If the 60-day continuous for MDI is starting earlier than planned, it may collide with JOP165.

Continuing campaigns:

* JOP159 CME's in Lyman-alpha (#6870), SWAN/LASCO/EIT/UVCS, POC: Chris St Cyr, Eric Quemerais

Targets of opportunity for the whole period:

* JOP136/MMOP009 Default RHESSI collaboration (#6850)

* JOP153/MMOP003 Major Flare Watch (#6930)

Campaign number 6850 is for "individual instrument studies" selecting an AR target [partially] influenced by the Max Millennium target. This target will be observed by a significant number of ground based observatories, so chances for serendipitous co-observations are good.

b) Intercalibration activities

Last Intercal 1: April 1 (Week 14)

* May 6 Intercal 1, CDS/EIT/SUMER, start about 12 UT

We will have NRT before (and during most of) the study.

c) Individual instrument plans


See section 1 (boundary conditions) for MDI continuous contact periods.

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.

UVCS: See their planning page (below) and the SOHO calendar for weekly plans.

CDS: See their request diary for details (


See section 1 (boundary conditions) for EIT bakeouts/shutterless and other special items.

LASCO may be requested to support IPS measurements of slow solar wind in late May and/or early June with high cadence white-light measurements (primarily C2). An EIT bakeout could be scheduled for this time to optimise LASCO cadence. IPS teams are aware of expected SM5 periods and conflicts are not expected. CDS will participate with a time series on quiet sun near disk centre. Still no word - lead investigator on sick leave at the moment.


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: Friday May 23, right after weekly meeting in the EOF

* 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.

* If anyone has projects that require high-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.

* Commanding outlook

- These times are subject to change - More details available if wanted:

Week 18 - Apr 28 - May 04: D27 all day on Monday. D27 for part of the day on Tuesday, Wednesday, Sunday. Thursday is good. Large gap on Friday. Small gap on Saturday.

Week 19 - May 05 - May 11: D27 all day on Monday, Thursday, Saturday. Small gaps on Tuesday and Wednesday. Large gap on Friday.

Week 20 - May 12 - May 18: D27 part of the day on Monday, Thursday, Saturday. Large gaps on Monday and Sunday. Small gaps on Tuesday, Wednesday, Friday.

Week 21 - May 19 - May 25: D27 all day on Monday and Saturday. Tuesday and Sunday are good. Small gaps on Wednesday and Thursday. Large gap on Friday.

Week 22 - May 26 - Jun 01: D27 all day Monday. Tuesday, Saturday, Sunday are good. Small gaps on Wednesday and Thursday. Large gap on Friday.

// end //

More status reports and news releases or top stories.

Please follow SpaceRef on Twitter and Like us on Facebook.