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Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, 2011, Volume 153, Book 1, Pages 7–16 (Mi uzku900)  

Frequency properties of the quasiperiodic variations of midlatitude Es layer traces amplitude

A. D. Akchurin, K. M. Yusupov

Institute of Physics, Kazan (Volga region) Federal University

Abstract: In the present work, we report about long-term measurements of echoes from Es layer performed using ionosonde in Kazan with 1 minute period of ionogram registration. Deep quasiperiodic variations resembling interference beats at certain frequency range in amplitude of echoes from Es layer were observed. A new form of data presentation was introduced, which allowed not only to display clearly the critical frequencies of ionospheric layers, but also to demonstrate the fine structure of ionospheric layers. The beats appeared at 4 MHz in the afternoon and at $2$ MHz at night, and had an extent in the frequency range of $\sim0.5$$2.5$ MHz. As the sounding frequency increased, the distance between the minima increased from $30$ to $700$ kHz. Occurrence probabilities of echoes from Es layer were determined depending on structural features of the reflection.

Keywords: vertical sounding of ionosphere, Es layer, amplitude-frequency characteristics, quasiperiodic variations of Es layer traces amplitude, interference of magnetoionic components, structural features of Es layer reflections, $f$-plot, ATF-plot.

Full text: PDF file (1770 kB)
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UDC: 550.388.2
Received: 20.12.2010

Citation: A. D. Akchurin, K. M. Yusupov, “Frequency properties of the quasiperiodic variations of midlatitude Es layer traces amplitude”, Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki, 153, no. 1, Kazan University, Kazan, 2011, 7–16

Citation in format AMSBIB
\Bibitem{AkcYus11}
\by A.~D.~Akchurin, K.~M.~Yusupov
\paper Frequency properties of the quasiperiodic variations of midlatitude Es layer traces amplitude
\serial Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki
\yr 2011
\vol 153
\issue 1
\pages 7--16
\publ Kazan University
\publaddr Kazan
\mathnet{http://mi.mathnet.ru/uzku900}


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