Abstract
The candidate models for the definitive geomagnetic reference field (DGRF) for the years 1945, 1950, 1955 and 1960—S45, 50, 55, 60, SFA45, 50, 55, 60, SFAS45, 50, 55, 60, and BGSMF50, 60—are evaluated using magnetic observatory data and observatory anomaly solutions given by the CSFC(9/80) and GSFC(12/83) models. The results indicate that the series of SFA models is the most successful series of models, and the BGSMF60 model is the best individual model, but the BGSMF50 model is less successful.
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