Well-inform increasing of the radar penetration by high broad-band radio pulses with the account of the under surface medium modeling at the real climatic factors influence

Abstract

The problems of the electrodynamic parameter space-temporary sharing in the capillary-porous media at real climatic and weather factors influence are considered. It is shown, that these distributions have non-stationary character. A technique of finding of such distributions under the external and internal factors action is resulted. It come to a conclusion, that when deciding a direct electrodynamic problem for ultra-wideband signals in capillary-porous media it is necessary to take into account the non-uniform character of the distribution their electrodynamic parameters, stipulated by the influence of the moisture and temperatures. At development of the broadband sensing data interpretation methods the problem of identical interaction description of electromagnetic waves with sensing media, characterized by efficient complex dielectric permeability (e) is one of the most urgent. It is connected with sensing mountain sorts, ground-soils, building materials etc. represents itself the complex dielectric heterogeneous media with capillary-porous structure. In the dry condition they are lumpy dielectrics but in the humid condition they are half-conduct media. In real natural conditions these media constantly contact with varying temperature field and water in various modular condition. Herewith the water is a variable component and defines the dielectric property of such media (1). When deciding the problems of radiowave diagnostics of condition and properties of such capillary-porous media it is necessary to take into account the space-temporary distribution into electrical characteristics, such as the complex dielectric permeability (e) and electrical conductivity (σ). These parameters are complex functions of moisture, temperature, kind and structure of media, and interacting with media the electromagnetic field frequency. In real conditions the moisture (W), temperature (T) in such media are changed in the area and time under various external and internal factors. The problem of determination of space distribution dynamic of the moisture, temperature and dielectric characteristics in capillary-porous media under influence of the various external factors considered in (2) in detail. Based on model representations of the flowing theory, which assumes a power-mode character of the capillary-porous material dielectric parameters dependence from the volume contents of the component with large generalized conductivity, the electrical model is designed by authors. This electrical model has satisfactory describe the moisture and temperature dependencies of complex dielectric permeability, as well as electrical conductivity of capillary-porous media with regular distributed volume moisture within band (10 2 -10 10 ) Hz (3,4). Used in given working the dependencies of electrodynamic parameters of capillary-porous systems from moisture, temperatures and electromagnetic field frequencies has a kind (2):