Summary
Two and three dipoles approximating the earth's main magnetic field are determined minimizing a sum of squares of differences between the dipole fields and the earth's magnetic field. Numerical results have been obtained by the aid of a digital computer for epochs 1932, 1942, 1950 and 1960.
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Bochev, A. Two and three dipoles approximating the earth's main magnetic field. PAGEOPH 74, 29–34 (1969). https://doi.org/10.1007/BF00875184
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DOI: https://doi.org/10.1007/BF00875184