Extreme values in ionospheric radio propagation

Main Article Content

P. A. Bradley

Abstract

Proposals are made for Earth-space and space-space paths to apply the term ?propagation degradation probability?, analogous to ?basic circuit reliability? adopted within the Radiocommunication Sector of the International Telecommunication Union (ITU-R) to quantify the performance of HF terrestrial ionospheric radio circuits. The principal elements characterising propagation impairments are described and formulae and a table given by the ITU-R are reproduced relating many of these effects to the path total electron content. Expressions are provided enabling estimates of the probabilities of occurrence of user-specified extreme values to be estimated in terms of their median quantities and day-to-day variabilities. The need is stressed for additional data collection and analyses both to refine the median values and to derive the required reference variability factors.

Article Details

How to Cite
Bradley, P. A. (2002) “Extreme values in ionospheric radio propagation”, Annals of Geophysics, 45(1). doi: 10.4401/ag-3493.
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