Fig. B.1

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Comparison of the conductivity profiles of the Earth. The profiles obtained from the WDC ionospheric conductivity model (https://wdc.kugi.kyoto-u.ac.jp/ionocond/sightcal/index.html) are shown as dotted lines. The profiles obtained with the formulation derived in Sect. 2.1 are shown as solid lines. The field-free conductivity σ0 (Eq. 15) is shown in black, the Pedersen conductivity (Eq. 17) in orange, and the Hall conductivity (Eq. 16) in blue.
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