Physics
Scientific paper
Nov 1962
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1962jatp...24..921w&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 24, no. 11, pp. 921-936
Physics
3
Scientific paper
In the previous papers of this series formulae have been derived to yield the contribution by each layer of a horizontally stratified ionospheric medium, to the total reflected field for waves at oblique incidence. It has been shown how these elementary contributions yield the usual reflection coefficients when integrated over the entire depth of the medium. In these papers isotropic conditions were assumed throughout. In the present paper the theory is extended to anisotropic ionospheres in which the earth's magnetic field is vertical and the wave is at vertical incidence. Under these conditions, the ordinary and the extraordinary waves are propagated and reflected independently and the characteristics of the reflection process of each wave are studied separately. Two ionospheric models are considered. In the first model an exponential electron density profile is used and the second model uses a sech2 profile. Results relating to reflection levels are compared with the usual definitions of ray theory. In general the agreement between the full wave results and the ray theory are shown to improve with increasing wave frequency.
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