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Scaling Analysis Applied to Ionospheric, Solar and Geomagnetic Data
Mošna, Zbyšek ; Koucká Knížová, Petra
Scaling analysis based on structure function zeta(q) computed using wavelet analysis and spectrum D(h) is used to study possible connection of ionospheric system with the solar and geomagnetic activity. Data from six ionospheric stations (critical frequency foF2), solar flux F10.7 and geomagnetic indices AE, Kp and Dst are used. Data of foF2 show scale invariance in the period range 2–32 day. Scaling properties of ionospheric data show strong dependence on geomagnetic latitude of the station. Similar distribution of values of scaling exponents h for ionospheric and geomagnetic activity AE and Kp suggests connection between these systems. Values of h for foF2 and F10.7 have different distribution which suggests weak connection between these systems at chosen periods.
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Automatic Visualization Method of Height–Time Development of Ionospheric Layers
Mošna, Zbyšek ; Koucká Knížová, Petra
An automatic method for visualization of variability of ionospheric plasma in terms of ionospheric layers is presented. Here, we use the virtual reflection height for visualization. We directly plot the height–time dependence using original raw digisonde outputs. It gives us an opportunity to promptly visualise the ionospheric digital data and locate events of the interest for further analysis. In this paper, we present a variability in height of E-layer with a special focus on the sporadic E-layer. The proposed method is applicable for any ionospheric region.
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Analýza kritických frekvencí v ionosféře
Mošna, Zbyšek ; Šauli, Petra ; Santolík, Ondřej
Ionosféra je vysoce proměnlivý systém. Pro popis ionosféry se často používají kritické frekvence, které udávají maximální elektronovou koncentraci v dané ionosférické vrstvě. Ionosféra, podobně jako mnoho dalších přírodních systémů, vykazuje scaling vlastnosti. V tomto článku jsou uvedeny výsledky scaling analýzy z ionosférických dat ze stanice Průhonice, geomagnetických dat a dat sluneční aktivity z let 1957-2005.
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