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Revista de Matemática Teoría y Aplicaciones
Print version ISSN 1409-2433
Abstract
KIRYANOVA, Kseniya S.; KRYUKOVSKY, Andrey S. and LUKIN, Dmitriy S.. Simulation of decametric wave propagation in the ionospheric plasma . Rev. Mat [online]. 2013, vol.20, n.1, pp.21-34. ISSN 1409-2433.
The decametric radiowaves propagation in the ionospheric plasma was considered. Bicharacteristic system of equations was used in the modeling ray structures. This system, which allows finding the ray paths with great precision, was obtained by D.S. Lukin. Models of the ionosphere with horizontal gradients were used in the calculations; local inhomogeneities, such as reduced electron density in the maximum layer and increased electron density below the maximum layer, were taken into account. The features of shortwave propagation, such as getting a wave of interlayer channel, distribution and out of it, reflection of waves from different ionospheric layers were explored. Was shown that the rays can be ejected from the field of distribution and curled when hit in the inhomogeneity of the ionosphere. The formation of caustic surfaces and its dynamics were studied. The radiowaves propagation in the Earth’s ionosphere was studied. This ionosphere profiles were restored the scientific group led by Professor V.E. Kunitsyn by radiotomography method based on real observations. Ray structures in the area of “equatorial anomaly” were built. The models, both including and excluding the effect of Earth’s magnetic field and the influence of the equatorial anomaly were considered. Ray structures at the different positions of the radiation source, as well as different operating frequency, were investigated. Dynamic model of the ray’s propagation was developed.
Keywords : Decameter radiowaves; the bicharacteristic system; ionospheric plasma; the equatorial anomaly; ray structures.