OPERATIONS
Science Operations
FINAL MINUTES FOR SOHO 20070427 SPWG MEETING
1. Boundary conditions
a) Orbit, attitude and manoeuvres
- SOHO is in normal roll (0 deg) position
- manoeuvres
May 29 roll, stationkeeping and momentum management (timing TBC)
Aug 28 stationkeeping and momentum management
Aug 30 or 31 roll (timing TBC)
b) Communications with the spacecraft
Graphical DSN schedule: http://soho.nascom.nasa.gov/soc/dsn/
* May 18-Jun 5 26 m keyhole
* May 22-May 31 34 m keyhole
* Aug 11-Sep 9 26 m keyhole
* Aug 19-Sep 2 34 m keyhole
- The need and approach to reduce FOT manpower requirements needed for
complex operations during the keyhole remains in effect until further
notice.
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)
* May 4-17 SOHO/STEREO Campaign, EIT/MDI/STEREO-EUVI
* May 9,16 EIT Shutterless #27, TBC
- 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.
- 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 periods will be during keyholes. Dates and times are
defined when the DSN schedules become available.
e) Others
TRACE will have a summer eclipse season from about 12 May - 16 Jul (dates
are TBC).
Hinode eclipse season 7 May - 10 Aug.
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 (#8007)
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. As
long as the spacecraft 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 relevance and continuation (whether the originators have
enough/alternate data) of these campaigns (except perhaps for RHESSI) is
under review.
* Apr 26-29 MDI Continuous Contact
Default plan is full disk Magnetograms and Dopplergrams.
* May 04-May 17 JOP187 Stereoscopic Observations of Coronal Structures
(#7233), EIT/STEREO-EUVI/CDS/MDI/TRACE/Hinodes-EIS/
Hinode-SOT, POC: William Thompson & Simon Plunkett
STEREO SECCHI requests synoptic EIT & LASCO data and prefers EIT to be
obtaining full-resolution images. The SUMER/EIS campaign will take place
in March and April to avoid EIT/SUMER submode conflict (i.e., allow SOHO
to be in submode 6 during this campaign).
SECCHI has also expressed interest in having Hinode to also join in the
campaign (Hinode participation is TBC).
The timing of this campaign is driven by the desire to conduct it when
the STEREO spacecraft separation angle is in the range 7-10 degrees, but
the timing is also constrained by the beginning of SOHO keyhole period on
18 May. The separation angle on May 4 is 6.5 degrees (and is acceptable
to SECCHI). Timing remains TBC.
EIT science planner through May 12 is Joe Gurman; May 13 - 17, Jack
Ireland.
Description of JOP 187 ("Stereoscopic Observations of Coronal
Structures"; http://sohowww.nascom.nasa.gov/soc/JOPs/jop187.pdf) has been
drafted by Simon Plunkett.
Still TBD, if the shutterless run #27 on May 9 will be included.
MDI has also been asked to participate in this coordination for 4-17 May.
Full disk, 1 minute cadence Magnetograms or high resolution, 1 minute
cadence Magnetograms and Continuum images have been requested. MDI can
support either 4-17 May or 7-18 May (keep in mind that a keyhole period
starts 18 May).
CDS sequences have been outlined - the CDS planner will select studies
depending on the STEREO sequence and available targets.
TRACE will be supporting these observations.
Comment from Simon Plunkett: Hinode-EIS will conduct raster scans in a
set of lines selected to cover a broad range of temperatures. I am still
awaiting final details on what Hinode-SOT will be able to do. They will
be in eclipse season, and it is unclear how this will affect their
observations. I believe SOHO and TRACE can respond faster than Hinode to
changes in target, so I suggest that Hinode should drive the target
selection. STEREO will make full-disk observations.
* May 9, 15 EIT Shutterless #27, EIT/STEREO-SECCHI (TBD),
POC (SECCHI): William Thompson
Segment 1
Wednesday May 9, 2007 DSS-27 16:50-00:00 UT; run time 19:00-21:40 UT
Segment 2 (notice date change)
Tuesday May 15, 2007 DSS-27 14:10-23:45 UT; run time 19:00-21:40 UT
There may be SOHO/STEREO-SECCHI collaboration on one or both of the runs,
still TBC.
* May 7-20 Exceptional Ulysses Quadrature observations, UVCS/CDS/EIT/
LASCO/Ulysses/Hinode/STEREO-SECCHI
POCs: Giannina Poletto, Giulio Del Zanna
The quadrature angle on May 14 is 55 degrees below the equator at west
limb (position angle of 215 degrees).
For additional and more detailed information on the quadrature, see also
section 2c/UVCS.
The observations consist of two parts:
1) May 7-11/18-20, coordinated observations with Hinode,
UVCS/CDS/EIT/Ulysses/Hinode/STEREO-SECCHI
Observations are conditional on an active region being at the limb to
obtain electron temperature, density, chemical abundance, and
ionization state of the plasma as function of height.
If no suitable AR is available in the SW quadrant, but there is one in
the SE limb, the connection with Ulysses will be missed and
observations targeted to SE.
EIT's support with synoptic images and CME watch will be sufficient.
Provisional support from CDS, details are under discussion.
The POC has confirmation from Hinode that the off-limb campaign is
still scheduled, but not clear yet exactly when and which days. For
next week, Hinode is going to follow the 'Del Zanna' active region
that is now near the East limb and will be at the West limb when the
campaign starts.
2) May 12-17, observations with radio scintillation measurements,
UVCS/LASCO/Ulysses/MERLIN/STEREO-SECCHI
The IPS observations will occurr on 12/14/15/16/17 May. STEREO
will support, but details are to be worked out. LASCO has been
contacted and plans to support.
* Jul 3-8 JOP178 Filament and its Environment (TBC)/
JOP157 Bright points in active regions (TBC),
SOHO/THEMIS, POC: Brigitte Schmieder
Proposal for consideration from the POC. JOP157 would be used, if a target
of opportunity appears. SOHO supports are solicited.
* Jun 13-17 MDI Continuous Contact, TBC
Current default plan is full disk magnetograms and dopplergrams. Timing
TBC.
* Jul 18-22 MDI Continuous Contact, TBC
Default campaign is full disk, 1 minute cadence magnetograms and
dopplergrams.
* Aug 5-18 Filament/Cavity-CME-ICME IHY-CIP campaign,
CDS/UVCS/TRACE/Hinode-EIS/Hinode-XRT/Hinode-SOT/COMP/
SOLARC/ProMag/MWA/RHESSI, POC: Terry Kucera
As part of the International Heliophysical Year (IHY), we propose an
observing campaign in the time interval August 5-18, 2007 which will
follow a targetted filament from East to West limb, in order to study its
morphology, evolution and activation, and quantify its magnetic and
plasma properties. Our study will be greatly enhanced should the filament
erupt as a CME, and if it does, we will also examine in situ observations
in order to link any pertinent ICME and magnetic cloud observations to
their filament source.
CDS has not heard from the POC yet, but is likely to participate in some
form.
MDI inquired, whether its support is solicited.
* Sep 10-Nov 11 MDI 60-day Continuous Contact (TBC)
DSN schedule is not yet known (see section 1b). MDI will run 1 min
cadence, full disk magnetograms and dopplergrams.
* Oct 22-Nov 4 Active region morphology studies (TBC), SUMER/VTT/
HINODE (TBC)/TRACE/STEREO
b) Intercalibration activities
Last Intercal 1: 25 April 2007
* May 14-18 ICAL01 (#7113), CDS/EIT, TBC
Details and confirmation will be determined by the planners. New date
will need to be determined, as shutterless 27's segment 2 takes place on
15 May.
EIT: ICALs are OK except (usually) during the weeks of shutterless.
Comment from CDS: Would it be useful to run ICAL when SECCHI runs its
'all wavelengths' programme?
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 downlink 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 back in focus 5, best focus for full-disk observing.
Notice concerning availability of SOHO/MDI data:
The hardware supporting the MDI data archive at Stanford University
will be relocated during the week of 28 April through 6 May,
2007. During part of that time it will not be possible to retrieve
data from the Stanford Helioseismology Archive, including most MDI
data, either directly or through the VSO. We do not expect the system
to be unavailable for the whole week, but data users should be aware
of the possibility of such an interruption of service, and plan
accordingly.
Rick Bogart, MDI Data Scientist
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://www.cfa.harvard.edu/uvcs/observations/obst.html.
A document from Steve Suess and Giannina Poletto discussing the
Ulysses-SOHO quadrature geometry is available from Michael Uzzo and also
at http://sohowww.nascom.nasa.gov/soc/UlyPosAng2007-2008.pdf.
CDS:
For details see http://solar.bnsc.rl.ac.uk/scientificops/request.shtml.
Given the extended duration of the Ulysses-SOHO quadrature, CDS will
carry out several observations at a convenient date selected at a
relatively short notice.
LASCO/EIT:
EIT: 195 A CME watch plus synoptics at 6-hour cadence, as usual. Full-res
CME watch whenever we're in submode 6.
SUMER:
There are tentative plans for a campaign from Oct 22 to Nov 4, working
title "Active region morphology studies, joint observations of SUMER,
VTT, HINODE, TRACE, STEREO". HINODE participation is still TBC. Despite
the substantial photon load accumulated during the recent SOHO-HINODE
campaign the remaining detector is still doing fine.
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
* Next SPWG: Friday 25 May after daily & weekly meetings EIT: No comment CDS: No comment MDI: Either SUMER: No comment TRACE: Either UVCS: Either 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. * Future Mercury and Venus transits: SOC is requesting the Flight Dynamics Facility (FDF) to provide estimates and data for not only disk, but also for coronal transits. For this purpose FDF needs a criterion (radial/angular distance from Solar disk centre) to define the coronal transits. Currently FDF has been instructed to use SOHO/Sun/[Mercury,Venus] angle of (35 arcmin (from centre of Solar disk) as criterion. Instrument teams are requested to provide the SOC with information on whether a larger angle is applicable. * Hinode operational and planning information can be found from http://www.isas.jaxa.jp/home/solar/hinode_op/ * STEREO operational and planning information can be found via http://stereo-ssc.nascom.nasa.gov/, more specifically from http://stereo-ssc.nascom.nasa.gov/plans.shtml. * 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. * To provide more unambiguous identification, individual instruments on board spacecraft other than SOHO will be as of this SPWG be referred to with notation SPACECRAFT-INSTRUMENT, for example Hinode-EIS. * The Project Scientist has decided that submission of the Inputs to the Activity Plan (IAPs) will change to be voluntary. The PS has informed the SOHO community of the change on 22 Feb by e-mail. * The FOT will begin testing the automation procedures on the week beginning 19 March. The passes will continue to be manned until after an operational readiness review and both agencies agree to a change in the mission management plan, both of which won't be for at least a couple of months, after we have significant experience with the automation. * New JOP vs. modified existing JOP rules-of-thumb: New JOP, if/when scientifically or qualitatively new type of a coordination is set up; modified JOP, when the investigation (the foci or targets thereof) remains essentially the same but new instruments/spacecraft/GBOs/etc are brought to bear.
