Derivation of proposed international geomagnetic reference fields models for 1945, 1950, 1955 and 1960

Details Derivation of proposed international geomagnetic reference fields models for 1945, 1950, 1955 and 1960 Derivation of proposed international geomagnetic reference fields models for 1945, 1950, 1955 and 1960

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987pepi...48..293l&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 48, Issue 3-4, p. 293-305.

Physics

10

Scientific paper

IGRF models for 1945, 1950 and 1955 were derived by fitting observatory, repeat and survey data in 5 year segments centered in each epoch. The geographic distribution of the data was poor. To constrain the model in regions of no data, we incorporated an a priori model into the fitting process at each epoch. These a priori models were derived by projecting a 1980 model based on MAGSAT data back in time. The effect of the a priori model is evaluated and found to be useful, although the procedure can be improved.
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