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Integral and Spherical-Harmonic Analyses of the Geomagnetic Field for 1955.0, PART 2

1963; Society of Geomagnetism and Earth, Planetary and Space Sciences; Volume: 15; Issue: 2 Linguagem: Inglês

10.5636/jgg.15.73

2185-5765

E. H. Vestine, W. L. Sibley, John W. Kern, J. L. Carlstedt,

Solar and Space Plasma Dynamics

A numerical integration method for analyzing the geomagnetic field is developed from Poisson's integral. A new surface grid, suitable for use with integral analysis, is described. This grid is based on subdivisions of a spherical icosahedron, and its points are almost uniformly spaced over a sphere. This integration method is applied to calculations of field values, field lines, and conjugate points. The results are compared with those of earlier spherical-harmonic analyses by Vestine and Sibley. A comparison is also made between those conjugate points calculated by spherical harmonics from different sets of coefficients derived from various sets of isomagnetic charts.