Д.В. Растягаев

This work is devoted to research of the infl uence of local non-homogeneities on ionospheres on feature of radiowave propagation. In the article EM wave propagation had been investigated by the bi-characteristic method to a non-uniform ionosphere in view of infl uence of the Earth magnetic fi eld. In work singularities of ray propagation of ordinary and non-ordinary electromagnetic waves in an anisotropic ionosphere plasma are considered at the presence of local non-homogeneities. It is found out the complex caustic focusing such as the cuspoidal catastrophes. The cases of non-homogeneities both increasing, and lowering of electronic concentration in the ionosphere plasma are investigated. The modeling of ray trajectories in an ionosphere with layers F and Е is executed, and also in case of the presence of simultaneously several local non-homogeneities. Steady formation of ray loops to an ionosphere – “ionosphere attractor” is revealed

On the basis of the numerical solution of the space-time bicharacteristic system the propagation of frequency-modulated of signals in anisotropic ionospheric plasma is considered. The numerical modeling of propagation of ordinary and nonordinary waves in one-layer and two-layer models is executed