An assessment of the near-surface accuracy of the International Geomagnetic Reference Field 1980 model of the main geomagnetic field

Details An assessment of the near-surface accuracy of the International Geomagnetic Reference Field 1980 model of the main geomagnetic field An assessment of the near-surface accuracy of the International Geomagnetic Reference Field 1980 model of the main geomagnetic field

Jan 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pepi...37....1p&link_type=abstract

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

Computer Science

Sound

1

Earth Surface, Geomagnetism, Magnetic Variations, Mathematical Models, Secular Variations, Accuracy, Magsat Satellites, Satellite Sounding, Statistical Analysis

Scientific paper

The new International Geomagnetic Reference Field (IGRF) model of the main geomagnetic field for 1980 is based heavily on measurements from the MAGSAT satellite survey. Assessment of the accuracy of the new model, as a description of the main field near the Earth's surface, is important because the accuracy of models derived from satellite data can be adversely affected by the magnetic field of electric currents in the ionosphere and the auroral zones. The authors assess the near-surface accuracy of the new model by comparing it with values for 1980 derived from annual means from 69 magnetic observatories, and by comparing it with WC 80, a model derived from near-surface data. The comparison with observatory-derived data shows that the new model describes the field at the 69 observatories about as accurately as would a model derived solely from near-surface data.

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