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			 **   THE GEM MESSENGER   **
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						     Volume 6, Number 39
						     July 2, 1996

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PLAN FOR A GGCM (GEOSPACE GENERAL CIRCULATION MODEL)
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From:  Dick Wolf and Michael Hesse

Discussions at last week's GEM Workshop indicated enthusiasm for getting
started immediately on the design of the Geospace General Circulation
Model, which is to be a central product of the GEM research program.  There
is a clear need for a comprehensive magnetospheric model that can be
accessed and utilized by the entire community.  A committee has been formed
to draft a general plan for development of the GGCM code and its support
structure.  Members of the writing committee are as follows:

Jim Drake (drake at plasma.umd.edu)
Mike Heinemann (heinemann at plh.af.mil)
Michael Hesse (hesse at gsfc.nasa.gov)
John Lyon (lyon at tinman.dartmouth.edu)
Nelson Maynard (nmaynard at mrcnh.com)
George Siscoe (siscoe at buasta.bu.edu)
Dick Wolf (wolf at alfven.rice.edu)

We plan to have a first draft available on the Web by August 1 and will
solicit reactions from the GEM community at that time.  A final version of
the plan is to be forwarded electronically to the GEM Steering Committee by
about September 1.  If the Steering Committee approves the plan, their
endorsement will be immediately announced to the GEM Mailing List.

The fast time schedule is designed to allow people to refer to the plan in
preparing this Fall's GEM proposals.  The plan is expected to recommend
that several small concept or feasibility studies be funded in FY97.  Each
study would suggest a specific plan for the GGCM, including the program
structure that would control and link the various computational modules as
well as the organizational structure that would guide development of the
code and make it available for use by the scientific community. The desired
community access includes not just the use of the code itself, but also the
capability to integrate individually developed independent science modules.


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