The prediction of horizontal ray-path deviation effects in high-frequency ionospheric propagation arising from large-scale temporal and geographical variations in the ionospheric structure is investigated. A technique for the rapid calculation of these predicted path deviation effects involving the use of the Institute for Telecommunications Sciences ionospheric prediction model is presented. Examples are presented illustrating the use of this technique in high-frequency radio source location applications and the influences of effective ...
In an effort to solve the fading problem encountered in large-aperture arrays of the Wullenweber type, several space-diversity antifading techniques are proposed and discussed. The results of an experimental study of dual-diversity systems incorporating these techniques are presented and the performance of these systems in relation to that of a conventional space diversity system of small-aperture elements is determined. Both the experimental method and the analysis techniques used in evaluating ...
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