Integral and Spherical Harmonic Analyses of the Geo-magnetic Field for 1955.0.

Integral and Spherical Harmonic Analyses of the Geo-magnetic Field for 1955.0.

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Spherical-harmonic analyses of American and Soviet isomagnetic charts for 1955.0. An integration method is developed from Poisson's integral, and for it, a new surface grid based on a spherical icosahedron's subdivisions. Also discussed are the chang...