Normal and anomalous geomagnetic fields separated by solving the eigenvalue problem

Details Normal and anomalous geomagnetic fields separated by solving the eigenvalue problem Normal and anomalous geomagnetic fields separated by solving the eigenvalue problem

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ang....38..331p&link_type=abstract

Annales de Geophysique, vol. 38, July-Sept. 1982, p. 331-337.

Computer Science

Sound

Eigenvalues, Geomagnetism, Magnetic Anomalies, Atmospheric Sounding, Magnetic Variations, Matrices (Mathematics), Nonuniform Magnetic Fields, Orthogonal Functions, Space-Time Functions

Scientific paper

The components of the geomagnetic field variations are represented as a sum of terms formed by products of two orthogonal functions which depend purely on the time and space co-ordinates. The systems of the orthogonal functions are obtained by solving the eigenvalue problem for a matrix corresponding to the data of a specific variation on several permanent observatories or temporary field stations. In this way, variation fields are resolved into normal and anomalous parts corresponding to individual eigenvalues. This approach was tested on the Sq data from 44 observatories.

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