Spherical Harmonic Analyses for the Spheroidal Earth.

by Anne B. Kahle, J. W. Kern, Ernest H. Vestine

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The assumption that the earth is a true sphere leads to errors in the coefficients derived from most spherical harmonic analyses of the surface geomagnetic field. Presented in this memorandum are two methods for correcting the coefficients. The corrections are shown to be significant.

This report is part of the RAND Corporation Research memorandum series. The Research Memorandum was a product of the RAND Corporation from 1948 to 1973 that represented working papers meant to report current results of RAND research to appropriate audiences.

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