Quasi-five- and ten-day oscillations in f0F2 and their possible connection with oscillations at lower ionospheric heights

D. Altadill, J. Lastovicka


The statistical analysis of the 5-day and 10-day oscillations inferred in the upper and lower ionosphere in Central Europe from f0F2 measured in Pruhonice and the radio wave absorption in the lower ionosphere shows a remarkable degree of similarity for relative amplitudes of oscillations (not for absolute amplitudes). The relative amplitudes in both regions do not express a significant solar cycle effect and their seasonal variation is also similar except for winter. The typical relative amplitude of both 5- and 10-day oscillations in the F2-region is about 4%, which is useful information for PRIME.


upper ionosphere;5 and 10 day oscillations

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DOI: https://doi.org/10.4401/ag-4001
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Published by INGV, Istituto Nazionale di Geofisica e Vulcanologia - ISSN: 2037-416X