Метод визначення енергетичних параметрів радіозавад на межі зони радіовидимості

Formulation of the problem in general. During the propagation of electromagnetic waves in real conditions, the effect of their attenuation is observed, which is associated with the absorption or scattering of waves in the troposphere, as well as diffraction energy losses. This significantly affects the energy parameters of radio signals, the determination of which is considered particularly difficult at the edge of the radio visibility zone. The article aims to develop a method for determining the energy parameters of radio interference (radio signals) at the edge of the radio visibility zone using the linear interpolation method to provide operational calculations for assessing the electromagnetic situation. Research methods. In the course of writing the article, the methods of systematic analysis of electromagnetic wave propagation processes and synthesis of the method for determining the energy parameters of radio signals were used. This methodological approach made it possible to obtain an expression for determining the electromagnetic field attenuation factor, which considers the propagation of electromagnetic waves in the surface layers of the troposphere with corresponding losses, in particular due to different polarisations of signals and receiving antennas. Analysis of recent research and publications. Several studies and publications have been devoted to the determination of the energy parameters of radio signals, which indicate that such parameters are affected by the relative position of transmission line elements, the directional characteristics of the antenna systems of radio communication and radio interference, and the conditions of electromagnetic wave propagation. At the same time, no due attention was paid to developing a methodological apparatus for determining the energy parameters of radio interference at the edge of the radio visibility zone to predict the possible interference situation in the combat zone. Presenting the main material. It is proposed that the linear interpolation method be used to determine the energy parameters of radio signals at the boundary of the radio visibility zone, which is covered by a range of ranges that depend on the line-of-sight distance. It is established that the energy parameters of radio interference can be estimated through the electromagnetic field strength at a given point in space or the power flux density (Condition-Pointing vector) of radio signals at the location of the receiving antenna. The expression for the approximated value of the electromagnetic field attenuation factor at an arbitrary range within the «penumbra zone» is obtained. The procedure for determining the energy parameters of radio signals at the edge of the radio visibility zone has been developed. Elements of scientific novelty. The method can increase the efficiency of determining the energy parameters of radio interference at the edge of the radio visibility zone by reducing the number of computational procedures. Theoretical and practical significance of the article. This method is advisable for solving applied problems of building radio communication lines, as well as for predicting the possible interference situation in the area of hostilities. Conclusion and the perspectives of future research. The proposed method for determining the energy parameters of radio interference on the border of the radio visibility zone, which uses linear interpolation of the function for the electromagnetic field attenuation multiplier, provides an increase in the efficiency of determining the energy parameters of radio interference on the border of the «penumbra zone».