Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/1745
AuthorsGulyaeva, T.* 
Spalla, P.* 
TitleEnhanced variability in the topside ionosphere
Issue DateSep-1995
Series/Report no.38/3_4
URIhttp://hdl.handle.net/2122/1745
KeywordsIonosphere
total electron content
vertical-incidence sounding
disturbance indices
Subject Classification01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation 
05. General::05.02. Data dissemination::05.02.99. General or miscellaneous 
AbstractVariability of total electron content (TEC) observed by the Faraday rotation method at Florence has been stud- ied with the same technique applied independently to the ionospheric parameters foF2 and M(3000)F2 of the ground-based vertical-incidence sounding database (VID). Results of daily and monthly TEC disturbance indices at sub-ionospheric point are compared with variability of the ionosphere at Rome and Gibilmanna (de- duced from VID) for a period of 1976 to 1991. During moderate and high solar activity the variability of TEC is greater than the variability of VID, whereas during solar minimum the situation is opposite. In this context joint TEC and VID observations distinguish either the F region peak or the topside ionosphere heights where the dynamic processes dominate at different times.
Appears in Collections:Annals of Geophysics

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