The surface impedances are calculated below a spherical multilayer isotropic ionosphere and below a continuously stratified cylindrical anisotropic ionosphere in the presence of a transverse magnetic field. The propagation characteristics are obtained by applying the modal equation of a spherical geometry. In another approach the planar surface impedance is referred to a height above the lower ionospheric boundary, but the attenuation rates per 1000 km computed by the two methods agree within a fraction of 1 db. The computed attenuation rates are also compared with measurements.
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J. Galejs (1964) studied this question.
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