PROBABILITY IDENTIFICATION OF AIR TARGETS S BY TWOCOORDINATE RADAR

The paper is devoted to the problem of recognizing low-altitude low-speed air targets (helicopters) moving in the area of responsibility of onshore ship traffic control systems. The main information base of such systems is the two-coordinate radar of the circular survey. Separation from the array of observable objects of air targets requires the use of special procedures for processing information. In the paper, a mathematical model of the problem of observing air objects is formulated, based on equations of the "state-measurement" type and finite-dimensional representations of the least squares method. In view of the initial nonlinearity of the problem, it is proposed to linearize it about some support solution that characterizes the a priori ideas about the trajectory of the observed object. The main attention is paid to the problem of the boundaries of the solvability of the problem under conditions of instrumental measurement errors. The results of numerical simulation for typical situations are presented. It is shown that the proposed algorithm makes it possible to decide on the degree of belonging of the object to the air class, while the problem is solvable in ranges of height / range ratio that are acceptable for a wide range of practical fields.

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