AN INTEGRATED METHOD FOR VERIFYING THE ACCURACY OF EARTH’S MAGNETIC FIELD MODELS: A CASE STUDY OF THE WEST SIBERIAN PLATFORM
V.N. Sergeev1, A.A. Soloviev1,2, D.V. Kudin1, R.V. Sidorov1, I.M. Aleshin1,2, F.V. Perederin1,2, K.I. Kholodkov1,2, D.K. Mokrov2, A.A. Kamaev1, A.A. Grudnev1,2, V.V. Kabrov1, V.A. Atabekyan3
1Geophysical Center, Russian Academy of Sciences, Moscow, Russia
2Schmidt Institute of Physics of the Earth, Russian Academy of Sciences, Moscow, Russia
3AO Institute of Geology and Fossil Fuel Development, Moscow, Russia
Keywords: Geomagnetic measurement, Earth’s magnetic field, measurement method, aeromagnetic survey, ground-based survey, magnetic field component, magnetic anomaly, magnetic field model verification
Abstract
We propose a comprehensive field method for assessing the accuracy of the Earth’s magnetic field models. Our approach involves instrumental determination of the geomagnetic field vector elements at specific locations. The measurement complex includes aeromagnetic surveys using unmanned aerial vehicles and ground-based surveys comprising areal pedestrian magnetometry and absolute measurements of magnetic declination and inclination. The developed method enables the determination of the Earth’s magnetic field in regions with insufficient coverage by permanent ground-based geomagnetic observatories. We present the results of applying this method in the central part of the West Siberian Platform. These results confirm the effectiveness of the proposed approach for conducting high-precision measurements within time intervals constrained by seasonal and weather conditions. The resulting data exhibit high accuracy and demonstrate the potential of this method for determining the secular variation of the Earth’s magnetic field in arbitrary regions.
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