Uncertainty estimates in geomagnetic field modeling

Details Uncertainty estimates in geomagnetic field modeling Uncertainty estimates in geomagnetic field modeling

Sep 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989jgr....9412281l&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 94, Sept. 10, 1989, p. 12281-12299. Research supported by NASA.

Physics

28

Earth Crust, Geomagnetism, Mathematical Models, Weighting Functions, Computerized Simulation, Harmonic Analysis, Least Squares Method, Magsat Satellites

Scientific paper

This paper presents an extension of the conventional uncertainty analysis which characterizes the sources of uncertainty in the coefficients of the geomagnetic field models. The new formalism accounts for the systematic errors introduced by the omission of such sources as the presence of crustal fields, the external fields, and the field from the truncated terms. The usefulness of this formalism depends on two critical conditions. The first of these is the knowledge of the statistical properties of the fields whose parameters are not solved in the analysis, i.e., the crustal field and the external field. The second critical point in the practical use of the method is the approximation used for the weight matrix.

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