http://www.gsi.go.jp/ENGLISH/index.html The Geospatial Information Authority of Japan (GSI) is the only national organization that conducts basic survey and mapping and instructs related organizations to clarify the conditions of land in Japan and that provides the results of sur ...
http://sopac.ucsd.edu/ SOPAC provides GPS-related data from its GARNER archive via ftp and http . The GARNER archive contains over 5 terabytes of data, dating back to 1990, with a 15 terabyte data capacity.