Perpendicular error effect in the DGRF model proposals

Details Perpendicular error effect in the DGRF model proposals Perpendicular error effect in the DGRF model proposals

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pepi...37...25l&link_type=abstract

(International Association of Geomagnetism and Aeronomy, Symposium on the Mathematical Modelling of the Geomagnetic Field and Se

Statistics

Applications

5

Error Analysis, Geomagnetism, Spherical Harmonics, Contours, Foci, Magnetic Equator, Nasa Programs, Vector Analysis

Scientific paper

It is shown that when the effects of insufficient component (vector) data in geomagnetic field models are accounted for, pseudo-systematic errors can occur which are particularly large for sectorial coefficients. The coefficient errors correspond to error fields with foci on and near the dip equator and perpendicular to the main field. The existence of perpendicular error effects is demonstrated in three of the spherical harmonic models proposed for the DGRF of 1965-75. The models included the IGS model, the NASA model, and the USGS model. It is estimated that only about 15 percent of the component data is needed to avoid significant perpendicular error effect.

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