Abstract
The results of experimental studies of the fine structure of a signal in the vicinity of the maximum observed frequency (MOF) on the Khabarovsk—Nizhny Novgorod path of oblique chirp sounding (OCS) are presented. Additional tracks were observed in the region between the high-angle and low-angle rays during magneto-ionospheric disturbances. Under strong disturbances the ionograms were of a spreading type in the vicinity of the MOF. The observed effect was modelled in the presence of travelling ionospheric disturbances (TID) with different parameters. It is shown that the stratification of the high-angle ray into several additional tracks is a maximum for TID with vertical scales\(\ell _z \sim {\text{ 20 - 40}}\) km whose wave fronts make angles about 0–10° with the horizontal line. The possibilities of using the Pedersen mode as a probing wave for diagnostics of the fine structure of the ionosphere in the vicinity of the F-layer maximum are discussed.
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References
Yu. A. Kravtsov, M. V. Tinin, and Yu. N. Cherkashin,Geomagn. Aéron.,19, 769 (1979).
M. V. Tinin,Issled. Geomagn. Aéron. Fiz. Sol., No.29, 157 (1973).
D. B. Muldrew and R. G. Maliphant,J. Geophys. Res.,67, 1805 (1962).
L. P. Vorob’ova and V. A. Luganin,Geomag. Aéron.,17, 949 (1977).
V. A. Ivanov, V. P. Uryadov, V. A. Frolov, and V. V. Shumaev,Geomagn. Aéron.,30 107 (1990).
G. G. Bowman, R. H. Clarke, and D. H. Meehan,J. Atmos. Terr. Phys.,50, 797 (1988).
R. B. Rose,Radio Sci.,23, 257 (1988).
L. M. Erukhimov, V. P. Uryadov, Yu. N. Cherkashin, V. A. Eremenko, V. A. Ivanov, N. V. Ryabova, and V. V. Shumaev,Waves Rand. Med.,7, No. 4 (1997).
V. A. Ivanov, N. V. Ryabova, V. P. Uryadov, and V. V. Shumaev, in: Proc. Int. Conf. Electromagn. Adv. Appl., Torino, Italy (1995), p. 471.
L. A. Hajkowicz,Planet. Space Sci.,38, No. 7, 913 (1990).
V. A. Eremenko, L. M. Erukhimov, V. A. Ivanov, N. V. Ryabova, V. P. Uryadov, V. V. Shumaev, and Yu. N. Cherkashin,Dokl. Akad. Nauk (1997) [in press].
Additional information
Radiophysical Research Institute, Nizhny Novgorod; State Technical University of Ioshkar-Ola, Mari Republic; Institute of Terrestrial Magnetism, Ionosphere, and Radio Wave Propagation, Russian Academy of Sciences, Troitsk, Moscow region, Russia. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 41, No. 1, pp. 3–12, January, 1998.
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Erukhimov, L.M., Ponyatov, A.A., Uryadov, V.P. et al. Modelling of HF wave propagation in the vicinity of quasicritical rays in the disturbed ionosphere. Radiophys Quantum Electron 41, 1–6 (1998). https://doi.org/10.1007/BF02676706
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DOI: https://doi.org/10.1007/BF02676706