Physics – Geophysics
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jatp...42..929b&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 42, Nov.-Dec. 1980, p. 929-941.
Physics
Geophysics
6
Extremely Low Frequencies, Ionospheric Propagation, Propagation Modes, Transmission Lines, E Region, Geophysics, Wave Propagation, Wave Reflection
Scientific paper
An approximate theory is developed for ELF wave propagation in the transmission-line mode between the conducting earth and the ionosphere. The theory combines the reflection theory of Booker and Lefeuvre (1977) with the treatment of Greifinger and Greifinger (1978, 1979) of ionization below the reflection level. The procedure for evaluating ionospheric effects involves the evaluation of the reflection heights of ordinary and extraordinary magnetoionic waves and of the complex refractive indexes and elliptical polarizations for the waves at these heights, followed by the calculation of the equivalent complex heights of reflection and of the bottom of the ionosphere in order to obtain the phase velocity and attenuation rate. Consideration is given to the effects of simultaneous reflection from the D and E regions, and to the cases of three and five reflection heights, corresponding to daytime and nighttime conditions, respectively.
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