Abstract As a new index characterizing the diurnal variation of foF2 the half difference between daily maximum and minimum values AfoF2 is introduced. Deviations of more than 20% from the running average are characterized as disturbances distinguishing positive and negative deviations. This index applied to the data of many ionospheric stations during two solar activity minima (1963 through 1965 and 1985 through 1987) showed its sensitivity to regional disturbances as well as a clear difference between the two periods in relation to the number of “disturbed days”.
Spatial and temporal variability of the ionosphere during solar minima
Advances in Space Research ; 10 , 11 ; 31-34
01.01.1990
4 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Delayed response of the ionosphere to solar EUV variability
Deutsches Zentrum für Luft- und Raumfahrt (DLR) | 2018
|Variability of foE in the equatorial ionosphere with solar activity
Online Contents | 2013
|Analysis of ionosphere variability over low-latitude GNSS stations during 24th solar maximum period
Online Contents | 2016
|Variability of the ionosphere over Irkutsk at low solar activity
Online Contents | 2011
|