Developing space-time model of the main geomagnetic field based on satellite data for the epoch 2015–2020

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Abstract

Based on measurements of SWARM satellites, a model of the main geomagnetic field for the 2020 epoch and a model of annual field changes until 2025 were built. These models were included in the international model of the main geomagnetic field IGRF-13. The method of data selection and model calculation is described.

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About the authors

V. G. Petrov

Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation Russian Academy of Sciences (IZMIRAN)

Author for correspondence.
Email: vpetrov@izmiran.ru
Russian Federation, Moscow, Troitsk

T. N. Bondar

Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation Russian Academy of Sciences (IZMIRAN)

Email: bondar@izmiran.ru
Russian Federation, Moscow, Troitsk

References

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Supplementary files

Supplementary Files
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2. Fig. 1. Coverage of the globe's surface with SWARM measurements in one day.

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3. Fig. 2. Variations of spherical harmonic coefficients , , for the period 2014—2020.

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4. Fig. 3. Change in spherical harmonic coefficients for the period 2014–2020. Solid lines show the parabolic approximation of the data, dotted lines show the cubic one.

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5. Fig. 4. An example of data selection for calculating the harmonic coefficients of the model.

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6. Fig. 5. Changes in the coefficient of expansion of the magnetic field in terms of harmonic functions for the period 2014–2020.

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7. Fig. 6. Isolines of the distribution of the difference in D-components calculated using the IZMIRAN and IGRF models.

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