SOHO SPWG Minutes

  SPWG October 15, 1999 Meeting Minutes 
 

 1.  Review of action items

  * Intercal001: TRACE part added, see the JOPs page for either DVI or PS
                 format descriptions: http://sohowww.nascom.nasa.gov/soc/JOPs/
    
  * Action on: N. Gopalswamy
    Submit new JOP to SOCs: Microwave Enhancement in Coronal Holes, 
    SUMER/EIT/MDI/Nobeyama, to run October 1999, 2300-0700UT

 2.      Boundary conditions 

- Upcoming Maneuvers

  Leonids

     Momentum management in preparation for Leonids: November 10 or 12 
     After SPWG: FDF looking into moving momentum management to Nov 9.
     Fuel consumption approximately 50g.

     Instrument plans to be discussed at the SWT. First plans for the
     Leonids guideline is unchanged: protect the star tracker. This
     time, the new Coarse Roll Pointing (CRP) mode will be used both
     for the roll maneuver (~120 degrees) and for roll control (SSU OFF).

     Instruments should be safed by November 17, 02:20 UT

- MDI 5-day Continuous: Nov. 9 at 19:35 UT - Nov. 16 at 07:50 UT
 
 
3.  Priorities for the coming month

a) Joint observing plans 

   - JOP113: The Triggering and Evolution of Solar Flares
             SUMER/BBSO/TRACE/Yohkoh SXT
             SUMER participates when in high rate (Submode 4), and may
             contribute (w/Loops on Limb Study) when target is AR on limb.
             MDI expects to participate most of the time when receiving high
             rate.

   - JOP107: Lyman Line Series in Prominences and Lyman Continua (#6235),W44
          SUMER/CDS POC:Terry Kucera

   - Transit of Mercury, see http://sohowww.nascom.nasa.gov/soc/mercury99.html
     In EIT FOV November 15, 17:42 - November 16, 01:42 UT approximately,
     times depend on definitive orbit. SSR will be ON for this time period.
     SUMER will not be on since it is not an occultation, would not improve
     stray light asessment.

   - Microwave Enhancement in Coronal Holes to be run during October
     (see action item on N. Gopalswamy)

b) Individual instrument plans

   MDI -- Time/Distance Study of Active Regions, and/or Flare Watch. (November)
          Support of JOP113 when possible, and/or Oslo's uninterrupted 
          AR study.

   TRACE -- Eclipse Season (November 7, 1999 - February 5, 2000).
            Satellite has day/night cycle; Operations to be kept as simple 
            as possible.
            Continuous 4-panel mosaic limb study (20 Nov - 6 Dec)
   
   CDS -- Oslo sunspot/AR loops studies (W43, when not in submode 4), 
          no support for other studies, impact to synoptic studies 
          expected.

   EIT -- Bakeout during Submode 4, Oct 29 - Nov 01

   SUMER -- Loop diagnostics on the Limb, possible coordination with JOP113.

   UVCS -- Intercal009 will most likely not be run in W43

   LASCO -- Nothing unusual, C2/C3 synoptics continue.

   

c) Intercalibration activities 

   * Intercal001: W44, SUMER participation TBC with U. Schuehle

   * A new Intercal between TRACE, EIT (possibly also CDS) being
     discussed by T. Tarbell/J. Newmark.

4.  Preview of future months

* Not many changes since last time, see the Monthly Calendar at: 
  http://sohowww.nascom.nasa.gov/soc/head_calendar.html

* JOP112 Coordinated SOHO-Ulysses elemental abundance study
         December 4-12. Some SUMER/CDS commanding from MEDOC.

 
 5.  JOPs status
 

    * UPDATED: JOP104 Doppler shifts in X-ray jets
               SUMER diagnostics part changed
    


 6.  New JOPs

* JOP112, Coordinated SOHO-Ulysses elemental abundance study.
  UVCS/SUMER/CDS/LASCO/Ulysses, Leader: Giannina Poletto
  The JOP was accepted, though CDS part needs to be specified
  by Barbara Bromage.

* JOP113, The triggering and evolution of Solar Flares
  TRACE/Yohkoh/CDS/SUMER/MDI, Leader: Jake Wolfson/Lyndsay Fletcher
  The JOP was accepted.

 7.  AOB
  
* Next SPWG:  
  - Friday, November 19 at 2:00 pm. (To avoid the Thanksgiving holidays).

* REMINDER:  DSN support should be requested at least
  6 months in advance.  Keep this in mind for:  ground-based collaborations
  that require MDI support, stellar observations that require NRT, etc.