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Authors: | Bradley, P. A. | Title: | Extreme values in ionospheric radio propagation | Issue Date: | 2002 | Series/Report no.: | 1/45 (2002) | URI: | http://hdl.handle.net/2122/672 | Keywords: | ionosphere ionospheric propagation |
Subject Classification: | 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation | 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. |
Appears in Collections: | Annals of Geophysics |
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