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Authors: Perrone, L.* 
Pietrella, M.* 
Zolesi, B.* 
Malagnini, A.* 
Title: foF2 prediction in Rome observatory
Issue Date: 7-Aug-2008
Keywords: Ionosphere
ionospheric models
ionospheric forecasts
Subject Classification01. Atmosphere::01.02. Ionosphere::01.02.03. Forecasts 
05. General::05.07. Space and Planetary sciences::05.07.02. Space weather 
Abstract: A prediction procedure of the hourly values of the critical frequency of the F2 ionospheric layer, foF2, based on the local geomagnetic index ak, is presented. The geomagnetic index utilised is the time-weighted accumulation magnetic index ak(τ) based on recent past history of the index ak. It is utilised an empirical relationship between the log(NmF2(t)/ NmF2M), where NmF2(t) is the hourly maximum electron density at the F2 peak layer and NmF2M is its 'quiet' value, and the time weighted magnetic index. The prediction of foF2 is calculated during periods of severe magnetic activity in the current solar cycle 23 in Rome observatory.
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