SOHO SPWG Minutes
SPWG Meeting Minutes -- Friday, July 25, 1997
Chair: Bernhard Fleck
Notes: Laura Allen
1. Review of Action Items
All action items from previous SPWG are closed.
2. Boundary Conditions for the Coming Months
ACE is scheduled to launch on August 25. If the ACE launch gets
postponed until later.. the September activities (burns, roll, etc)
will slide a week *forward* in time into week 35 (Aug 25-31) so that
adequate DSN coverage (back-up antennas) will be able to be obtained.
Current schedule is:
S Aug 31 Gyro Calibration
M Sep 01 Momentum Management for Roll Maneuver (Labor Day)
T Sep 02
W Sep 03 +90 Degree Roll Maneuver (16 hour duration of roll)
- Roll from nominal to a delta of +45, dwell for 1 hour
- Roll from +45 to +90 and dwell at +90 for the remaining time
~ 13 hours observing time (1 hour at +45, ~12 hours at +90)
- MDI high rate data VC2/VC3 requested during this time
T Sep 04 RW 4 Maintenance, Momentum Management, Station Keeping
Also of note, we have received word that during the following days:
December 24, 25, 26, 31 and January 1
The DSN may not be able to give us the full 8 hours of our requested
long contacts (i.e. 6 hours instead of 8). Initial reaction from
teams present at the SPWG was that it should not be much of a problem
since they try to simplify their programs for the holidays anyway.
3. Preview of Future Months
After the September maneuver activities, there are plans to try and upload
new versions of Submode 2 and 3. The new versions can only work
with adding 8 additional packets (not the 12 additional packets that were
gained prior when Submode 1 was patched to create Submode 5).
The new Submode 2 would give 8 additional packets to CDS
The new Submode 3 would give 8 additional packets to LASCO/EIT.
4. Priorities for the coming month
See also: http://sohowww.nascom.nasa.gov/~soc/head_calendar.html
CDS - * Non-thermal broading along a loop, campaign with Norikura
(Aug 4-9 and Aug 23 - Sept 3)
* Spicule study with Tenerife (Aug 6-10)
* Bright Point Studies (JOP023) August 4 and 5 with Yohkoh
SUMER - will go to central meridian at some point in the future
The representatives present have not received input from
the PI so cannot supply much information at this SPWG.
UVCS and LASCO -- observations of Comet Tabur (within 10 solar radii
between August 16-19, magnitude 5.7 ; prime day for UVCS
is August 18 when it will be ~ 8 Solar radii)
UVCS -- Week 35 will be taken up mostly by calibrations.
LASCO also plans to do some C1 closed door calibrations
prior to Sept maneuver.
EIT -- Polar Plumes during week 33 with Sac Peak
Calibration rocket flight has moved to September 19
MDI -- continuous contact next month in August may be similar to last
month of their 3 month continuous contact they ran.
Collaborations with Sac Peak (no firm dates yet) and
Mount Wilson (Aug 28-30).
Also like to schedule runs of JOP068 in Weeks 36 and 37, since
the sun will be at maximum B angle.
5. JOPs status
6. New JOPS
JOP068 -- Solar Wind from Coronal Holes: A Closer Look
submitted by Craig DeForest
Rock Bush presented a viewgraph showing a plot of the data obtained during
the March roll. He thinks that at the next opportunity for a roll (May, 1998)
MDI would like to ask for some stops at 180 and 270 degrees.
Next SPWG will be on Friday, August 22.