Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/3052
Authors: Pietrella, M.* 
Perrone, L.* 
Title: A local ionospheric model for forecasting the critical frequency of the F2 layer during disturbed geomagnetic and ionospheric conditions.
Issue Date: 2007
URI: http://hdl.handle.net/2122/3052
Keywords: Ionosphere (Ionosphere-magnetosphere interactions, Ionospheric disturbances; Modeling and forecasting)
Subject Classification01. Atmosphere::01.02. Ionosphere::01.02.99. General or miscellaneous 
Abstract: An ionospheric forecasting empirical local model over Rome (IFELMOR) has been developed to predict the state of the critical frequency of the F2 layer (foF2) during geomagnetic storms and disturbed ionospheric conditions. Hourly measurements of foF2 obtained at the Rome observatory, hourly quiet-time values of foF2 (foF2QT), and the hourly time-weighted accumulation series derived from the geomagnetic planetary index ap (ap(τ)), were considered during the period January 1976 - December 2003. Under the assumption that the ionospheric disturbance index log(foF2/ foF2QT) is correlated to the integrated geomagnetic index ap(τ), statistically significant regression coefficients are obtained for different months and for different ranges of ap(τ) and used as input to calculate the short-term ionospheric forecasting of foF2. The empirical storm-time ionospheric correction model (STORM) was used to make comparisons with the IFELMOR model. A few comparisons between STORM’s performance, IFELMOR’s performance, the median measurements and the foF2QT values, were made for significant geomagnetic storm events (ap > 150) occurring from 2000 to 2003. The results provided by IFELMOR are satisfactory, in particular, for periods characterized by high geomagnetic activity and very disturbed ionospheric conditions.
Appears in Collections:Manuscripts

Files in This Item:
File Description SizeFormat 
risposta1_proof_corrections_angeo-2007-0003.pdfMain article888.65 kBAdobe PDFView/Open
Show full item record

Page view(s)

96
Last Week
1
Last month
3
checked on Jul 20, 2018

Download(s)

31
checked on Jul 20, 2018

Google ScholarTM

Check