S.A. Mochalov

In article questions of an estimation of spectral density of capacity (SDC) reflexions from a spreading surface on an exit of the channel of processing onboard coherently-pulse RLS detection of moving targets are considered. Universal parities which allow to count size SDC of ref-lexions at use of high, average and low frequency of repetition of impulses RLS of a flying machine, at a different relative positioning and vari-ous values of speeds of movement of carrier RLS and the purpose are received. At modelling the most general case when RLS has ambiguity of measurement, both range, and speed of the purposes is considered. Then the area of the spreading surface forming the reflected signal, represents set of the platforms formed by crossing of rings equal distances with areas equal dopler-s of frequencies. In turn, for reception of total value SDC of reflexions, it is offered to break each reflecting platform into the elementary platforms forming components of the reflected signal. Thus, in model additive representation of the reflected signal is used, summation is carried out on range rings, on lines of equal frequencies and to elementary platforms. In article the analytical expressions are received, allowing to count as azimuthal, and angular position of reflecting platforms, their sizes de-pending on conditions of supervision and operating modes RLS. The special attention was given to reception of the boundary azimuthal sizes of platforms for various rings of range. Relative position of all objects is for this purpose considered, the equation of projections of speeds is worked out. Boundary values dopler-s frequencies and, accordingly, radial speeds of the platforms, getting in dopler-s the filter in which there is a purpose are calculated. Formulas for an estimation of corners of sliding, corners of supervision of reflecting platforms are resulted also. The received expressions allow to calculate angular position of lateral petals of the diagramme of an orientation of the aerial under which ref-lexions are accepted. The parity for calculation of a specific reflecting surface of the sea Is recommended also. Working capacity of the offered methodical device is confirmed by results of calculation SDC of reflexions from a sea surface in various conditions of conditions. So, schedules of dependence SDC of reflexions from radial speed of the purpose are resulted at various values of frequency of following of impulses RLS, at various values of angular position of the purpose, three-dimensional images of distribution SDC of reflexions are presented also. The analysis of the basic laws of the received distributions is made. Recommendations for choice a modelling step are made.