OPERATIONS
Science Operations
FINAL MINUTES FOR SOHO 28 Aug 2008 SPWG MEETING
1. Boundary conditions
a) Orbit, attitude and manoeuvres
- SOHO will be right side up (0 degrees) as of August 21.
- manoeuvres
To the degree possible, manoeuvres take place during the last days of
34-m keyholes. Currently proposed or set manoeuvre dates are:
Nov 19 (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):
* 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 are now uplink capable and have been
successfully used.
- 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)
* Sep 20-Oct 4 SUMER Mini-Campaign, timing TBC (SM5)
* Oct 16,28 EIT Shutterless #33 (SM6)
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.
d) Instrument maintenance activities
EIT bake-out periods will be during keyholes.
e) Others
TRACE' next eclipse season will begin on 13 Sep 2008.
Daytime passes have been automated but attended since 16 Jun. Unattended
daytime automation is scheduled to begin begin 1 October. Since weekend
daytime passes will be automated and unattended, NRT will be interrupted
in the same way as the nighttime passes are for resets of software
anomalies. NRT schedule for all automated passes can be found at
http://sohowww.nascom.nasa.gov/soc/nighttime_nrt.txt.
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.
* Sep 20-Oct 4 SUMER Mini-Campaign, SUMER/Hinode-EIS
Submode change 6->5 13-14 UT on Thu Sep 18. SUMER power-up and
configurations take place on Fri Sep 19 and observations may begin
already on Sat Sep 20 (TBC).
SUMER door-closing and power-down are proposed to take place on Oct 6,
followed by submode change 5->6 also on Oct 6 (TBC).
Planned observations (status as of Aug 27) are listed below separately.
* Sep 20-Oct 4 Polar Coronal Hole Observation, SUMER/Hinode-EIS/Hinode-SOT
POC: Harra, Gabriel, Curdt
* Sep 20-Oct 4 Quiescent and Eruptive Prominences, SUMER/Hinode-EIS
POC: S. Parenti, J.-C. Vial
* Sep 20-Oct 4 Prominences (modified HOP73), SUMER/Hinode-EIS/Hinode-SOT/
Hinode-XRT/STEREO/TRACE/SST/DOT,
POC: T. Berger, S. Parenti (TBC)
* Sep 20-Oct 4 Polar Plumes, EIT/SUMER/Hinode-EIS/STEREO-EUVI,
POC: K. Wilhelm, L. Teriaca
* Sep 20-Oct 4 Polar Coronal Hole Plumes at Solar minimum,
SUMER/Hinode-EIS/Hinode-SOT/TRACE,
POC: G. del Zanna, L. Teriaca
* Sep 20-Oct 4 Ly-alpha / Ly-beta photon ratio, SUMER/MDI,
POC: W. Curdt
MDI high-rate observations requested in support of these observations
(timing and details TBD, MDI intends to do high-rate observations during
the Sep 24-28 continuous contact period).
* Sep 20-Oct 4 Quiet Sun network evolution, MDI/SUMER/Hinode-EIS/Hinode-SOT,
POC: D. Innes
Title TBC. MDI high-rate observations requested in support of these
observations (timing and details TBD, MDI intends to do high-rate
observations during the Sep 24-28 continuous contact period).
* 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 6-20 JOP 189 Physical mechanisms driving solar microflares
and network dynamic fibrils,
CDS/EIT/MDI/Hinode/TRACE (all TBC)
POC: Jan Rybak, Peter Gomory
MDI will support JOP189 as much as DSN contacts allow. MDI's preferred
time for the supports is the 5-day continuous contact period on Oct
16-20. MDI also prefers to support in only one mode (full-disk or
high-rate).
* 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.
This 5-day continuous contact might be used for a JOP189 and/or high-rate
helioseismology collaboration, details and observing sequence TBD. Would
like a status on DSN contacts for this continuous contact period as well
as for the month of October since we have some requests for
collaborations requiring high rate data.
* Oct 16, 28 EIT shutterless #33,
POC: Susanna Parenti
DSN passes (and hence exact times) still TBC.
* Oct 26 Daylight Savings Time ends in European Union at 01 UT
* Nov 2 Daylight Savings Time ends in the USA,
change in GSFC at 06 UT
* 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
HRFOV).
Since we are scheduled to have a 5 day CC in October, details for this CC
period are TBD. May do FD Helioseismology if requests for MDI HR have
been met during the Sept and/or Oct 5 day CC periods.
* 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: Aug 05
ICALs are normally performed monthly. Below is a SOC proposal for ICAL
weeks for the next six months.
* 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
* Jan 26-30 ICAL01 (#7113), CDS/EIT/Hinode-EIS/Hinode-SOT/STEREO
NOTE: 26-m keyhole begins on Jan 26 and 34-m keyhole
begins on Feb 1. ICAL might still be possible during this
period.
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. Due to Hinode planning cycle
ICALs need to be planned more in advance than has been the norm.
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
http://stereo-ssc.nascom.nasa.gov/plans.shtml).
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
accommodate.
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. 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. Since MDI has gotten
several requests for high-rate observing in Sep-Oct 2008, MDI will switch
to Focus 4, best focus for high-rate observing. The current plan is to
switch sometime during the week of Sep 8 and go back to Focus 5 before
the start of the Nov 2008 keyhole (5 Nov).
UVCS:
For weekly plans, see the SOHO calendar and the UVCS planning page:
http://www.cfa.harvard.edu/uvcs/observations/obst.html.
CDS:
For details see http://solar.bnsc.rl.ac.uk/scientificops/request.shtml.
EIT/LASCO:
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.
SUMER:
See section 2a for details.
TRACE:
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. Sep 26 Oct 24 Nov 21 Dec 19 Jan 23 Feb 20 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 http://spd.aas.org/SolarNews/archive/news.html#section1. * 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 http://sohowww.nascom.nasa.gov/operations/SPWG/spwg-20080118.html * 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 http://sohowww.nascom.nasa.gov/operations/SPWG/spwg-20080118.html * 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 http://sohowww.nascom.nasa.gov/operations/SPWG/spwg-20080118.html * 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 http://sohowww.nascom.nasa.gov/operations/SPWG/spwg-20080118.html * SOHO calendar email notifications: no change, see URL http://sohowww.nascom.nasa.gov/operations/SPWG/spwg-20080118.html
