The lower characteristic ELF altitude of the Earth-ionosphere waveguide: Schumann resonance observations and aeronomical estimates


Propagation of ELF fields in the Earth-ionosphere waveguide is treated in terms of a two-dimensional method with two complex characteristic altitudes as actual propagation parameters. The day-to-night variations of the lower characteristic altitude are estimated in two different ways: theoretically, on the basis of the parameter's physical model and… (More)

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