Verification of the geomagnetic field models using historical satellite measurements obtained in 1964 and 1970

Abstract In 2019, the World Data Center for Solar-Terrestrial Physics in Moscow digitized archive of observations Earth’s magnetic field carried out by Soviet satellites Kosmos-49 (1964) and Kosmos-321 (1970). As a result, scientific community first time obtained access to unique digital data set, which was registered at very beginning space era. This article sets three objectives. First, quality measurements is assessed their comparison with IGRF model. Second, we assess models, that were derived from these two satellites. Third, propose new, improved model geomagnetic secular variation based on scalar Graphical