Richard C. Kirby

Abstract: A brief survey is given of results from an experimental program extending over the last five years to investigate the nature and characteristics of high-loss regular VHF propagation by means of scatteriung and other mechanisms in the lower ionosphere. Short-term characteristics as well as diurnal, seasonal, and geographical variation of the observed signals are described. The results of pulse-determination of height of scattering, space-antenna and polarization experiments, and system are given. The dependence of the strength of the signals on path length, scattering angle and frequency is described. Considerations for communication applications are summarized.

Keywords: ionosphere; VHF; scattering

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

For questions or information on this or any other NTIA scientific publication, contact the ITS Publications Office at ITSinfo@ntia.gov or 303-497-3572.

Back to Search Results