Shilyaeva O. The development of the method to evaluate of troposphere influence on characteristics of radio engineering systems

Object - the effect of the boundary layer of the troposphere on the characteristics of radio systems. Purpose - to improve the accuracy of calculating margins and weakening factor in the transition zone from area to area diffraction beam tropospheric radio propagation in predicting areas radiosposterezhuvanosti radar systems, as well as distortions of the antenna patterns of terrestrial radio- based measurement results of the spatial distribution of the refractive index of the air in the boundary layer of the troposphere. Method-the method of geometrical optics, elements of differential geometry, Kirchhoff method, digital signal processing, numerical analysis and mathematical modeling. Results - The method of calculating the field which can improve the accuracy of short-term forecasting zones radiovydymosti radio systems; asked to analyze the structure of wave fronts, geometrical rays and random caustics corresponding to the current state of the troposphere to determine areas of inspection zone in which the attenuation factor is calculated explicitly; proposed an improved method of calculating the instantaneous antenna patterns of terrestrial radio systems based on the three-dimensional model of anisotropic structure of the troposphere, which is a distinctive feature of the well-known work, in which the expression for average directional diagrams obtained from the models are statistically homogeneous medium. Introduced - the scientific - research works PJSC " SCB RTP ," IRE NAS of Ukraine. Usikova KhNURE . Areas of use - radar and long-range radio communications.