Physics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jatp...48...51c&link_type=abstract
Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 48, Jan. 1986, p. 51-59.
Physics
4
Atmospheric Ionization, Ionospheric Propagation, Mirrors, Ray Tracing, Reflected Waves, Surface Distortion, Atmospheric Models, Atmospheric Refraction, Radio Echoes, Shear Layers, Sine Waves, Specular Reflection
Scientific paper
A systematic classification of reflections from a sinusoidally distorted-mirror has led to the identification of three classes of rays; direct simple rays which hit the mirror once on reflection; direct complex rays which hit the mirror several times before reflection; indirect rays which leave from and return to the source at different angles. The conditions on the distortion amplitude, wavelength and height for the different classes to exist are obtained. A comparison of results is made with those from a Chapman layer with a sinusoidally varying height of peak density, in the absence of any magnetic field. The broad classification of solutions is preserved, but direct and indirect rays are no longer independent and at large scale heights the presence of underlying ionization removes some solutions. The construction of ionograms of these profiles shows that indirect and complex direct rays contribute significantly to the traces observed.
Cooper Joshua
Cummack C. H.
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