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Earth, Planets and Space
Fig. 9. | Earth, Planets and Space

Fig. 9.

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

Fig. 9.

Shows the amplitude ratio and the cross phase calculated from the B28-B38 (top), B38-B37 (middle), and B37-B36 (bottom) ground station pairs. Each pair has two panels: The amplitude ratio (upper) and the cross phase (lower). Vertical dashed lines surround the frequency range where the amplitude ratio (cross phase) shows a bipolar (unipolar) pattern. See text for more details.

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