SOHO SPWG Minutes
SPWG FINAL MINUTES
Friday April 25, 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
* 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 http://soho.nascom.nasa.gov/soc/mercury2003/ 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.
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 Å
* 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
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
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/SST/MDI/[CDS], 08-18 UT,
POC: Tom Berger
* May 25-Jun 7 Quiet Sun Studies, TRACE/SST/MDI/[CDS], 08-18 UT
POC: Mats Carlsson
* Jun 8-Jun 22 Spicules, Mottles and Jets, TRACE/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/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 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
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 304Å 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
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 (firstname.lastname@example.org)
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.
* 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 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.
See their planning page (below) and the SOHO calendar for weekly plans.
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.
* 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
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,
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.