А.B. Borzov - Dr.Sc. (Eng.), Professor, Head of Department of Autonomus Information and Control Systems, Bauman Moscow State Technical University E-mail: borzov@rambler.ru К.P. Likhoedenko - Dr.Sc. (Eng.), Professor, Bauman Moscow State Technical University E-mail: wave@sm.bmstu.ru Yu.V. Karakulin - Post-graduate Student, Bauman Moscow State Technical University E-mail: gibraltarr92@gmail.com V.B. Suchkov - Dr.Sc. (Eng.), Professor, Bauman Moscow State Technical University E-mail: vbsuchkov@yandex.ru

At article the methods of calculation of specific RCS of clutters are considered. Application fields, virtues and disadvantages of each method are regarded. A review of existing analytical and empirical methods of calculation of specific RCS of ground surface and vege-tation clutters is carried out. Widespread methods of calculation of specific RCS of ground clutters, such as tangent plane method, small perturbation method, two scale model and small slope method are considered. Besides a few methods based on generalization of experiment data are considered: empirical γ-f model for centimeter wavelength, a-distributions for reflection from water, and empirical model for millimeter wavelength. With regard to reflection from vegetation canopies methods based on different approximations are considered: infinite cylinder approximation, Rayleigh-Gans approximation, discrete dipole approximation, based on physical optics and method of moments. Virtues and shortcomings of pointed methods are shown, application areas and restrictions of each method are also indicated. The technique of calculation of input signal of near radar systems from surfaces based on their polygonal and multipoint models is considered. The process of creating polygonal model of surface with chaotic roughness with the use of 3DStudio Max is shown. Formulas for calculating input signal of near radar system from surface, represented as local reflectors are shown. Results of simulation in accordance with suggested methods are presented. At conclusions derivation that there is a possibility to avoid shortcomings of described analytical and empirical methods is made by virtue of use of polygonal and multipoint surfaces models. The main difficulty of use of multipoint model is necessity in full information about electro physical structure of surface, that is not always can be achieved in practice.

 

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