Abstract
AbstractThe propagation path of cyclotron harmonic waves in the ionosphere and magnetosphere was derived by J. Bitoun. However, the propagation path at low altitude has not yet been investigated. This has been due to the complexity in the analysis in which the curvature of the earth's magnetic field must be considered. In this paper, the propagation path is expressed in a simple equation which considers the curvature of the earth's magnetic field. With this expression, the traveling distance varies depending on the magnetic latitude and altitude of the location of the wave exciter. With the assumed electron density distribution, the corresponding regions in the ionosphere and magnetosphere are clarified. Then the propagation path is calculated with two representative points in these regions. When kX0 > 0, the traveling distance becomes maximum after the reflection point. When kX0 < 0, the effect of the curvature is large, causing a large variation in the traveling distance.
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