OPERATIONS
Science Operations
FINAL MINUTES FOR SOHO 23 May 2008 SPWG MEETING
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 19 (TBC) station-keeping, momentum management
Aug 22 (TBC) roll
b) Communications with the spacecraft
Graphical DSN schedule: http://soho.nascom.nasa.gov/soc/dsn/
Keyhole dates for the next 6 months:
* Aug 01-30 26m Keyhole
* Aug 08-22 34m Keyhole
* Nov 05-22 26m Keyhole
* Nov 09-18 34m 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. Direct link to the list of
estimated dates for future keyholes is
http://sohowww.nascom.nasa.gov/soc/keyholes.txt.
- DSN D45 and D65 (34-m) antennae status
D45 and D65 have been and currently remain down-link/telemetry-only, but
are in the process of being upgraded with up-link/commanding capabilities.
The estimated time for the transmitters to change to operational status
is during the first half 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)
* Jun 23-Jul 3 SUMER observing (SM5)
* Jul 23,30 EIT Shutterless #32 TBC (SM6)
* Nov SUMER campaign TBD (SM5)
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.
The Jun 23 to Jul 3 SUMER observations are in support of JOP 213 (see
also section 2a) and in coordination with UVCS.
d) Instrument maintenance activities
EIT bake-out periods will be during keyholes. The most recent bake-out
took place May 16-22. The next bake-out dates are TBD.
e) Others
TRACE summer eclipse season begins on 10 May 2008.
According to latest predicts TRACE summer eclipse season 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
Unattended automated night passes for SOHO began October 6 2007.
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.
* Dec 2-May 28 Exceptional Ulysses Quadrature
The Ulysses mission is expected to end in early June 2008.
* May 10-25 JOP 157 Emerging Flux in Active Region (BP) or in Coronal
Hole (Jet) (#7274), EIT/CDS/MDI/Hinode/TRACE/THEMIS,
POC: Brigitte Schmieder
EIT has supported JOP 157 using the 195 A filter. EIT went into bake-out
on May 16 (see section 1d above), hence the support was limited to May
10-16.
MDI will support JOP157 with as many full disk magnetograms as possible
during the keyhole. May 16, 19, 20 and 21 are particularly bad days ---
we might only get 2 synoptic magnetograms. Daily information on
magnetograms obtained can be found here:
http://mdisas.nascom.nasa.gov/coordination.txt
CDS has been supporting and will support JOP 157 as the keyhole schedule
allows.
* May 10-25 JOP 178 Filament and its Environment (#7275),
EIT/CDS/MDI/Hinode/TRACE/THEMIS,
POC: Sanjay Gosain
Target-of-opportunity JOP in conjunction with the JOP 157; primarily for
May 20-25.
EIT: same as above for JOP 157.
MDI: same as above for JOP 157.
CDS has been and will support JOP 178 as the keyhole schedule allows.
* Jun 11-15 MDI Continuous Contact
Note "End-of-pass handling during MDI continuous contact periods" in
section 1b.
MDI has not gotten any specific requests for this particular 5 day CC.
MDI will do full disk, 1 minute cadence magnetograms and dopplergrams
unless there is an interesting target in the HRFOV.
* Jun 23-Jul 3 JOP 213 Chromospheric network structure and dynamics,
SUMER/MDI/Hinode-SOT/SST/TIP II/ZIMPOL II,
POC: Anna Pietarila
For details see the JOP 213 description at URL
http://sohowww.nascom.nasa.gov/soc/JOPs/jop213.txt.
SUMER will support. See also below "SUMER observing".
MDI has been asked to support JOP213 with HR magnetograms. MDI will
support this JOP as well as possible with the available high rate data.
MDI has been informed of the change in dates.
CDS is interested in participating --- requests to be informed of targets
& times
* Jun 23-Jul 3 SUMER observing
In addition to supporting JOP 213, SUMER will carry out coordinated
observations with UVCS.
SUMER proposes 19 Jun and 3 Jul as submode change dates.
The SUMER/Hinode campaign originally scheduled for Apr 2008 is postponed
until further notice. The campaign will be structured as multiple JOPs
in the same fashion as the 2006 SUMER campaigns have been.
The June 2008 SUMER observation period will be of limited scale and
scope, not a full-fledged campaign. Some of the JOPs outlined below may
also be tested during the June observation period, but running them "in
full" remains TBD.
Currently submitted JOP/HOP proposals are (timings remain TBD):
Jun 23-Jul 3 JOP 207 Eruptive and quiescent prominences Atlas with
SOHO and Hinode,
CDS/SUMER/UVCS/Hinode-EIS/Hinode-SOT/Hinode-XRT,
POC: Susanna Parenti.
Timing TBD.
Jun 23-Jul 3 JOP 208 Relationship between movements of magnetic
features and mass outflow in funnels,
MDI/SUMER/Hinode-EIS/Hinode-SOT/Hinode-XRT/TRACE,
POC: Hui Tian.
Timing TBD JOP 210 Checking the possible drives of solar wind origin
in the coronal hole,
SUMER/Hinode-EIS/Hinode-SOT/Hinode-XRT (all TBC),
POC: Hui Tian.
Timing TBD.
Timing TBD JOP 211 How does the solar wind originate from the
quiet-Sun region,
SUMER/Hinode-EIS/Hinode-SOT/Hinode-XRT (all TBC),
POC: Hui Tian.
Timing TBD.
Timing TBD JOP 212 Connection between UV explosive event and
magnetic cancellation,
SUMER/Hinode-EIS/Hinode-SOT/Hinode-XRT,
POC: Hui Tian.
Timing TBD.
Only JOP confirmed to run is JOP 208, JOP 209 will not be run during this
period. JOP 207 is a target-of-opportunity JOP. Confirmations on the
running of the other JOPs (210-212) have been requested by the SOCs.
SUMER also has plans for a dedicated observation "Lyman-alpha profile and
center-to-limb variation". The aperture door will be used to partially
vignette the incoming photon flux, thus avoiding detector saturation.
This has never been tried before. MDI and TRACE have been contacted to
support this special observation. The timing depends critically on the
availability of NRT, since the operation (about 1 hour) has to be carried
out interactively. Preferred dates would be 25 or 26 June.
MDI can support JOPs 208 and 209 to as well as it is able depending on
high rate telemetry availability. Probable forms of support are high
resolution magnetograms with full disk as an alternative. MDI has
contacted the JOP leaders about the need to coordinate MDI observations
for each day.
From MDI: SUMER has asked for specific observations June 25 and 26, we
should try to get as much DSN coverage as possible (to enable VC2/VC3)
during those days and probably for the Jun 23 - Jul 03 period.
From June 23 to July 3 UVCS and SUMER will be coordinating targets for a
campaign titled Polar Plume Observations. The objective is twofold:
1) infer the outflow speed wind profile in plume/interplume regions,
2) characterize the evolution in time of the morphological/physical
properties of plumes.
CDS requests to be added to the mailing list, as all JOPs of interest to
CDS, particularly to co-observe with Hinode.
EIT is waiting for JOP requests.
TRACE has received a request for JOP 208/209 and plans to support
* Jul 9-13 MDI Continuous Contact
Note "End-of-pass handling during MDI continuous contact periods" in
section 1b.
MDI has not gotten specific requests for this time period. MDI will do
full disk, 1 minute cadence magnetograms and dopplergrams unless there is
an interesting target in the HRFOV.
* Jul 23,30 EIT Shutterless #32
Pass schedule times remain TBD, but are expected to be firmed up soon.
* 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
minute cadence. FOV is TBD.
* Oct 15-19 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
minute cadence. FOV is TBD.
* Nov TBD SUMER/Hinode campaign
* Dec 10-14 MDI Continuous Contact
Note "End-of-pass handling during MDI continuous contact periods" in
section 1b.
Standard full disk, 1 minute cadence magnetograms and dopplergrams.
b) Intercalibration activities
Last Intercal was: Apr 22
May ICAL was postponed until after the keyhole
ICALs are normally performed monthly. Below is a SOC proposal for ICAL
weeks for the next six months.
* Jun 2-6 ICAL01 (#7113), CDS/EIT/Hinode-EIS/STEREO
* Jun 30-Jul 3 ICAL01 (#7113), CDS/EIT/Hinode-EIS/STEREO
* Aug 4-8 ICAL01 (#7113), CDS/EIT/Hinode-EIS/STEREO
* Sep 1-5 ICAL01 (#7113), CDS/EIT/Hinode-EIS/STEREO
* Oct 6-10 ICAL01 (#7113), CDS/EIT/Hinode-EIS/STEREO
* Nov 3-7 ICAL01 (#7113), CDS/EIT/Hinode-EIS/STEREO
CDS views Hinode-EIS participation as extremely important. STEREO-EUVI
observations might also be used, but ICALs need to be scheduled not to
coincide with STEREO manoeuvres or other interruptions in observations
(see http://stereo-ssc.nascom.nasa.gov/plans.shtml). EIS and Stereo have
been added to the Campaign #7113 description.
Dates, details and confirmation will be determined by the planners.
EIT: ICALs are OK except (usually) during the weeks of shutterless ---
whenever CDS prefers. All the dates proposed above are OK.
CDS: OK --- dates TBD by the planners.
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.
UVCS:
UVCS is scheduled to enter Keyhole Safe configuration on 8 May and
Keyhole Recovery is targeted for 21 - 23 May TBC.
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.
EIT and LASCO will do the annual long/full calibration set during the MDI
continuous (Jun 11-15 MDI Continuous Contact). Calibrations will be done
in real-time. June 11-13 still TBC. EIT/LASCO would like Submode 6 for
this calibration set, but it is not required. The calibration set dates
were chosen to be completed before SUMER campaign and Shutterless #32.
SUMER:
Next SUMER observation periods:
June 23-July 3
Nov (timing TBD)
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. Jun 27 Jul 25 Aug 29 Sep 26 Oct 24 Nov 21 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
