Orthogonality of spherical harmonic coefficients

Details Orthogonality of spherical harmonic coefficients Orthogonality of spherical harmonic coefficients

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980pepi...23....1m&link_type=abstract

Physics of the Earth and Planetary Interiors, vol. 23, Aug. 1980, p. P1-P4.

Physics

1

Geomagnetism, Orthogonality, Spherical Harmonics, Statistical Analysis, Fourier Series, Gravitational Fields, Polynomials, Spheres

Scientific paper

Orthogonality relations are obtained for the spherical harmonic coefficients of functions defined on the surface of a sphere. Following a brief discussion of the orthogonality of Fourier series coefficients, consideration is given to the values averaged over all orientations of the coordinate system of the spherical harmonic coefficients of a function defined on the surface of a sphere that can be expressed in terms of Legendre polynomials for the special case where the function is the sum of two delta functions located at two different points on the sphere, and for the case of an essentially arbitrary function. It is noted that the orthogonality relations derived have found applications in statistical studies of the geomagnetic field.

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