SOHO SPWG Minutes - May 1996

May 17, 1996, SOHO EAF, GSFC
Chair: B. Fleck
Notes: L.Allen and E.Larduinat

Attendees

L.Allen, E.Larduinat, C.Frohlich, V.Domingo, J.P. Delaboudiniere, A.Galvin, J.Saba, R.Schwenn, A.Fludra, A.Gabriel, P.Lemaire, D. Hassler, S.Gibson, J.L.Bertaux, J.Torsti, H.Kunow, B.Fleck, J.Kohl

Agenda

  1. Review of action items
  2. Boundary conditions for the coming month
  3. Priorities for the coming month
  4. JOPs status
  5. New JOPs
  6. AOB

Actions

SPWG 5.1:
On the PIs to provide drift/pointing information history to Project Scientist. Helmut Schweitzer to coordinate with instrument teams to obtain pointing history data.

SPWG 5.2:
On Luis Sanchez to correct error in SOHO orbit files. The velocity vector should be in heliocentric/ecliptic coordinates but it is not. It is presently in equatorial coordinates.

SPWG 5.3:
On Project Scientist to send out an e-mail request for PIs to submit a list of volunteer SOLs.

1. Review of action items from last SPWG

SPWG 4.1:
Agreement that the temperatures should not be changed to adjust S/C pointing. Final scenario still to be defined. More trending data is needed. Best reference point now is MDI. Recent drifts have been very small (SUMER encountered drifts of about 10 arcsec).

* ACTION ITEM (SPWG 5.1): On the PIs to provide drift/pointing information history to Project Scientist. Helmut Schweitzer to coordinate with instrument teams to obtain pointing history data.

SPWG 4.2:
Closed.

SPWG 4.3:
Closed. MDI will do jitter tests as practical.

SPWG 4.4:
Closed (ongoing).

* ACTION ITEM (SPWG 5.2): on Luis Sanchez to correct error in SOHO orbit files. The velocity vector should be in heliocentric/ecliptic coordinates but it is not. It is presently in equatorial coordinates. If taken at face value, this vector would imply that the SOHO spacecraft is leaving the eliptic plane at 10km/sec (!)

2. Boundary Conditions For the Coming Month

Continous DSN -- continuous telemetry but not commanding. Piet Martens wrote a memo asking for more uplink time, however not sure yet if we got the time requested since Piet was away this week.

From a S/C point of view, the next two months will be very quiet. No S/C adjustments. However, the first Ariane 5 launch with the Cluster payload is scheduled for May 30th. We may lose some uplink capability due to this launch.

Coordination of synoptic datasets: UVCS begins at 9:00 pm (local) for 13 hrs. beginning on the West limb. LASCO creates a C1 image every 40-50 minutes and a C2/C3 every 2-3 hours. LASCO does not have a regular schedule and performs its uploads w/NRT.

3. Priorites for Coming Month

MDI
Dynamics programme.

LASCO
Synoptic.

EIT
Synoptic. There are two phases 44 minutes each per day that EIT can do a subfield image. At present the size, position, and wavelength is fixed for a week. However, this may change with the next software upload. There is still no working planning tool which will be fixed within 2 months.

UVCS
Presented the following program: 
        27 May - 2 June   L. Strachan    Doppler Dimming Measurements
                                         in Streamers.  Coordinated UVCS
                                         and radio scintillation 
        3- 9 June         E. Antonocci   Coronal Holes and Streamers.
       10-16 June         A. Ciaravella  Zeta Tau. TBD Solar Observations.
       17-22 June         TBD            TBD
          17 June 		         121 Tau
       23-30 June  	  J. Kohl        Polar Plumes 
                                         Streamers above 5 solar radii
        1- 7 July 	  G. Poletto  	 STREAMERS
        8-14 July	  M. Romuli   	 STREAMERS
       15-21 July	  R. Kopp     	 STREAMERS
       22-28 July         J. Raymond     Elemental Abundances of Streamers
       29 July - 4 Aug    L. Strachan    Coronal Holes.

CDS
(i) The first priority is to get the GIS raw data dumps completed and the detector/slit GSETs calculated.

(ii) We anticipate supporting the Pic du Midi observations (JOP 22) on June 5-8.

(iii) We may support the other collaborations listed in the June schedule for SOHO, but do not have any detailed input for them from those proposing the Studies.

(iv) We will continue our standard monitoring and calibration activities - i.e. spectral atlases, synoptic scans etc...

(v) Having completed 2 months of a full science programme, we have tentatively planned further, more advanced, diagnostic studies, and some streamer and prominence studies as a lead into JOP 3, for the coming months.

(vi) Assuming the completion of the CDS GIS GSET calculations, we anticipate the running of JOP 27, the diffuse corona, which is currently not scheduled. The end of June would be a good time, to ensure that the necessary work is complete. In addition, if JOP 31 (streamers) is rescheduled to June, we will support it.

SUMER
Beginning of June collaboration with Pic du Midi. Run of JOP022 beginning of July.
The new monthly plan is on the Web.

5. NEW JOPS

There were two new JOPs presented:

  1. The Search for the Interstellar Focusing Cone (Presented by J.L. Bertaux)
    Contact persons:
  2. The Large Scale Structure of the Solar Minimum Corona (Presented by Sarah Gibson)
    Contact perons:

Proposal: SOHO Whole Sun Week

Toni Galvin suggested to pick a week when WIND is upstream to get magnetometer data. Also coordinate with other spacecraft and ground-based observatories. Should be run after 2 months continuous. Toni Galvin to check WIND schedule when to run this new JOP.

Probably want to bring this JOP up during the next SWT.

J.-L. Bertaux and S. Gibson to provide write-up of their JOPs for Web page.

6. AOB

SOLs
Each team should provide Science Operations Leaders (SOL). Teams that are not resident in the EOF such as GOLF, VIRGO, etc. would participate also. Due to the heavy burden on people that permanently reside in the EOF, it is encouraged that the SOL be brought in from outside the EOF. This SOL would spend 1 week learning how the EOF and its residents operate and plan things. Then the next week, the SOL would help coordinate scientific observations among the instrument teams.

If there are a set of JOPs that an instrument team is doing a particular week, the JOP leader and SOL leader could be combined.

** ACTION ITEM (SPWG 5.3): On Project Scientist to send out an e-mail request for PIs to submit a list of volunteer SOLs.