CISM MIC WG Meeting

 

Date: Friday, Feb 14, 2003

Time: 1:00 - 2:30 PM EST

Place: Access Grid

 

Participating Nodes:  BU, Dartmouth, NCAR, Rice

 

Agenda:

 

1) Work-In-Progress reports

 

2) Revisit "Issues and Directions" identified in the 1/17 meeting (notes attached)

 

3) Validation – As a lead-in to a more general discussion, Simon Shepherd will present a few slides on how he uses electrojet simulation results to calculate surface electric and magnetic fields over North America, quality of comparisons with data, and plans for future work. This capability is a candidate as a forecasting tool for transition to NOAA and may provide a useful metric for CISM codes.

 

4) Next Meeting (proposed): Mar 14, 1:00-2:30PM EST - check your calendar and AG node availability.

 

5) Other Issues 

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Notes from the 2/14/03 Meeting

Participants: BU, Dartmouth, NCAR, Rice

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The first CISM Advisory Council Meeting will be held on March 4 with participation via Access Grid.

Revelations

·       LFM-TING coupling does not yet include effects of the neutral wind in Ohm’s law. Next steps in development will include the neutral wind.

·       RCM time-step is 1-2 sec, but data is currently be acquired from LFM on the convection time scale of 5-10 min.

·       TIEGCM currently includes O+ only (no H+).

·       LFM does not specifically include effects of cusp or polar rain precipitation into thermosphere-ionosphere.

·       Initial calculations (Shepherd) of surface electric and magnetic fields over North America from LFM 3D currents at the ionosphere using a simple earth conductivity model show promise as a possible metric for CISM codes. Comparison with data suggests that the surface magnetic field is less insensitive to the earth conductivity model than the surface electric field. Consequently, the surface magnetic field is likely to provide a better metric for CISM codes than the surface electric field which is a more useful forecast variable for specific ground-based systems.

Action Items

·       Grid overlay from LFM, RCM and TING (Wiltberger’s power point slide) presented in the CISM “site visit” does not depict the actual grid on which TING is solved. An update is needed.

o      Burns, Toffoletto, Wang and Wiltberger to agree on the correct grid overlay map and present to WG next time.

·       Overture software translates (interpolates) solution on one grid for use in another program with a different grid.

o      Wiltberger to give an overview of Overture at next WG meeting.

·       The idea of developing a common Poisson solver for use in LFM, RCM and TING to calculate the convection potential function needs further consideration.

o      Lotko to present at next WG meeting a provisional flowchart for a MI Coupler with the common Poisson solver embedded.

CISM needs to develop a systematic approach to validation and metrics. Killeen suggests developing a matrix of metrics relating observables to measurement techniques. (For reference, see Sec. 2.4, 2.5 dealing with metrics from The National Space Weather Program Implementation Plan 2nd Edition, http://www.ofcm.gov/nswp-ip/tableofcontents.htm.) Burns has begun developing a strawman plan for T-I validation. As the CISM validation meister, Harlan Spence should be brought into this discussion.

o      Burns and Spence to discuss initial plans for validation at the next WG meeting.