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Authors: Kouris, S. S.* 
Xenos, T. D.* 
Polimeris, K. V.* 
Stergiou, D.* 
Title: TEC and foF2 variations: preliminary results
Issue Date: 2004
Series/Report no.: 4/47 (2004)
Keywords: ionospheric variability
radio wave propagation
space and satellite communications
Subject Classification01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 
Abstract: Investigation of the relationship between TEC and (foF2)2 shows that although they are highly correlated, a «hysteresis» effect exists between them. The slab thickness is greater before than after mid-day for equal cos ?values. Moreover, a comparison of the calculated upper and lower quartiles of variability in TEC, foF2 and Nmax, respectively shows that the variability of TEC lies between those of foF2 and Nmax depending on the level of solar activity.
Appears in Collections:Annals of Geophysics

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