2.2.2 spase://SMWG/Person/Nobuhiro.Ishikura 2012-04-20T12:34:56.789 Nobuhiro Ishikura Geographical Survey Institute, Geodetic Department, Japan

Geomagnetic Section, Physical Geodetic Division, Geographical Survey Institute, Tsukuba-shi, Ibaraki-ken, Japan

nob@gsi.go.jp