*Paul Prikryl^1,2、Reza Ghoddousi-Fard³、Knut S. Jacobsen⁴、Ari Viljanen⁵、James M. Weygand⁶、Donald W. Danskin²、P. Thayyil Jayachandran¹、Bharat S. R. Kunduri⁷、Yngvild L. Andalsvik⁴、Martin Connors⁸、Tibor Durgonics⁹ (1.Physics Department, University of New Brunswick 、2.Geomagnetic Laboratory, Natural Resources Canada、3.Canadian Geodetic Survey, Natural Resources Canada、4.Norwegian Mapping Authority、5.Finnish Meteorological Institute、6.Dept. of Earth Planetary and Space Sciences, University of California、7.Bradley Dept. of Electrical and Computer Engineering, Virginia Tech、8.Athabasca University、9.Technical University of Denmark, National Space Institute)