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Artículo
Day-to-day changes in experimental electron density profiles and their implications to IRI model
(Elsevier, 2004)
The electron density variability at fixed heights is studied for use in the International Reference Ionosphere IRI model. Monthly median, upper and lower quartile values were obtained for foF2, hmF2, B0 and B1 as deduced ...
Artículo
Daytime Electron Density At the F1-Region in Europe During Geomagnetic Storms
(European Geosciences Union, 2002)
This study attempts to demonstrate changes in the ionospheric F1-region daytime ionization during geomagnetic storms. The F1-region is explored using available data from several European middle latitude and lower latitude ...
Artículo
Predicted and measured bottomside F-region electron density and variability of the D1 parameter under quiet and disturbed conditions over Europe
(Elsevier, 2004)
Modelling and forecasting of ionospheric parameters is very useful for different radio communication purposes. As long as variations in the ionosphere form regular patterns, the empirical International Reference Ionosphere ...
Artículo
Longitudinal Differences Observed in the Ionospheric F-Region During the Major Geomagnetic Storm of March 31, 2001
(European Geosciences Union, 2004)
A new ionospheric sounding station using a Canadian Advanced Digital Ionosonde (CADI) was established for routine measurements by the “Universidade do Vale do Paraiba (UNIVAP)” at S˜ao Jos´e dos Campos (23.2_ S, 45.9_ W), ...
Artículo
Worst cases for a one-hop high frequency link
(Istituto Nazionale di Geofisica e Vulcanologia (INGV), 2002)
The characterisation of a HF channel by means of monthly electron density profiles can be complemented with a detailed study of radio propagation «worst cases» on situations with extremes conditions of radiopropagation for ...
Artículo
Use of raytracing in models to investigate ionospheric channel performance
(Elsevier, 2007)
The main parameters that characterize an ionospheric channel, frequency, elevation angle, group path, ground range, and apogee have been obtained by means of 2D raytracing program called abcray03. The analysis has considered ...