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http://hdl.handle.net/2122/2114
Authors: | Kouris, S. S.* Polimeris, K. V.* Romano, V.* Zolesi, B.* Cander, L. R.* |
Title: | Within-the-hour variability: levels and their probabilities | Issue Date: | Aug-2006 | Series/Report no.: | 4-5/49 (2006) | URI: | http://hdl.handle.net/2122/2114 | Keywords: | ionospheric variability radio wave propagation space and satellite communications |
Subject Classification: | 01. Atmosphere::01.02. Ionosphere::01.02.05. Wave propagation | Abstract: | The study of foF2 data measured every 5-min and of TEC measurements made every 10-min shows that the within-the-hour variability is different in the two parameters. Deciles of this variability for foF2 and for TEC are determined together with the probabilities of exceeding a given level of variability. Furthermore, considering hourly values, it is found that the variability in TEC is like an «intrinsic noise» throughout the day of the order of less than 5% of the hourly value; but at sunrise and often at sunset large values take place. A seasonal dependence is evident. Besides, a within-the-hour variability in foF2 is always present with large values at sunrise or sunset depending on the season, and also during disturbed ionospheric conditions. |
Appears in Collections: | Annals of Geophysics |
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