Hi, I just got GMAT R2018a built from sources, and am interested in this also. Could you share details of what you think could be needed to generate from any external source NRLMSISE-00 (or other) atmosphere models the raw data that then would have be put into the GMAT system? Example would possibly getting access to live data from
https://ccmc.gsfc.nasa.gov/modelweb/mod ... sise00.php or from an offline program (C-code like
https://www.brodo.de/space/nrlmsise/ or something like that). I am not an expert in this field, but have done Matlab based lookups before in other work. Instructions for building this module are still available for older revisions of GMAT (
http://gmatcentral.org/display/GW/Build ... se00Plugin) - so we already have a basic template for attempting a new module, I think.
Samudra N3RDX