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Earth, Planets and Space
Fig. 4 | Earth, Planets and Space

Fig. 4

From: A 2015 International Geomagnetic Reference Field (IGRF) candidate model based on Swarm’s experimental absolute magnetometer vector mode data

Fig. 4

Spectral comparison of the ASM-V 2015.0 IGRF candidate model with other models. Lowes-Mauersberger spectra of the ASM-V 2015.0 IGRF candidate model (solid red), as well as of the differences between this model and, respectively, the official 2015.0 IGRF model (dashed red) and VFM 2015.0 auxiliary model (dashed black). Also shown, the spectra of the differences between the VFM 2015.0 auxiliary model and, respectively, the official 2015.0 IGRF model (dashed green) and N-VFM 2015.0 auxiliary model (dashed blue); all at Earth’s surface (i.e., at reference radius a = 6371.2 km)

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