Description: The necessity of diminishing of passive interferences influence for the peak mode of radiolocator operations becomes more important in difficult meteorological conditions, when reflections from meteorological educations are added to the signals of lo-cal objects. At the same time reflection from local objects, that is represented on the indicators of radiolocator, serve as addi-tional orienteers for the landing zone head about airplane location in the landing area. At the same time on the separate seg-ments of distance the uncompensated reflections from local objects mask the mark of airplane that results in errors in measuring of coordinates of airplanes or makes impossible the realization of such measuring. At the improvement of the radio-locator sig-nal processing amplitude channels is expedient to foresee possibility of reduction of passive interferences influence to the reflec-tion of aircraft signals and retention on the indicator of contours of local objects marks in the landing area. For this purpose it is suggested to realize the method of video pulses differentiation. The method of analog differentiation of video pulses have been used for more than 50 years in radars only with the peak channel of receive. The implementation of digital processing principles of such signals is expedient to realize more effective method of diminishing of influence of passive interferences in the peak mode of operations of radio-locator is a method of digital differentiation. From the analysis of prospects of development of the systems of air traffic guidance providing ensues the necessity of providing of the safe landing of airplanes on the air fields in difficult me-teorological conditions that causes the necessity of improvement of the current landings systems. Therefore the expediency of realization in the landings radio-locators of digital differentiation of video pulses of receiver with the purpose of disguise decline of aircraft signals and bright local objects passive interferences on the final stage of landing is substantiated. Principle of reali-zation of digital differentiation of video pulses of receiver during of digital channel of processing implementation in PRL and reflection of radio-location information is offered. Comparative description of efficiency of the use of analog and digital differen-tiation in relation to decline of influence of passive interferences on probability of exposure and supervision of aircraft signals on the final stage of landing is given.
Keywords: landing radio-locator, selection of moving-targets, passive interferences, local objects, differentiations of video pulses.
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