Mathematics – Probability
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37.1535s&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 37, Dec. 1975, p. 1535-1544.
Mathematics
Probability
2
Atmospheric Models, Ionospheric Electron Density, Polar Radio Blackout, Probability Distribution Functions, Spread F, F Region, Frequency Distribution, Frequency Ranges, Geomagnetic Latitude, Graphs (Charts), Ionospheric F-Scatter Propagation, Scintillation
Scientific paper
A method of combining models of ionospheric F-layer peak electron density and irregularity incremental electron density into a model of the occurrence probability of the frequency-spreading component of spread-F is presented. The predictions of the model are compared with spread-F occurrence data obtained under sunspot maximum conditions. Good agreement is obtained for latitudes less than 70 deg geomagnetic. At high latitudes the model is corrected by inclusion of a 'blackout factor', resolving an apparent discrepancy in the occurrence statistics at high latitudes. The blackout factor is ascribed to the effect of polar blackout on the spread-F statistics and/or the lack of a definitive incremental electron density model for irregularities at polar latitudes. Ways of isolating these effects and assessing their relative importance in the blackout factor are discussed.
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