Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.

Core versus non-core institutions represented for gempak download data: Apr 1 2010 to Mar 31 2011

Core institutions = US-based, degree granting universities, colleges and technical schools and EDU entities. Undetermined/misc data = crawlers, ISPs, unresolved IP addresses, etc.
Note: The chart above is interactive - click on the pie pieces to see the data.