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Earth, Planets and Space
Fig. 3. | Earth, Planets and Space

Fig. 3.

From: Hodograph method to estimate the latitudinal profile of the field-line resonance frequency using the data from two ground magnetometers

Fig. 3.

Illustrates the model hodograph R mm (Eq. (25)) modified from R m of Fig. 2 under the effect of the inhomogeneous underground conductivity. With the assumption that underground effect changes the amplitude ratio by a constant factor, and changes the cross phase by a constant number, the circle is rotated and dilated/contracted. See Section 3 for more details.

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