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Abstract

The paper considers a new approach to the search for information parameters of the radar field, the source of which is a radar with a real antenna aperture. Such aperture is necessary for the construction of a digital radar map of the terrain, applicable for the navigation of an aircraft along a trajectory that is close to being vertical to the Earth's surface. The article reveals the essence of the approach. Because of the development of analog-to-digital conversion of the gi-gahertz frequency range, it became possible to analyze the radar signal reflected from the un-derlying surface of the Earth and located on it objects in details. It has opened up new opportu-nities in the search for information parameters of the reflected signal (a video pulse). There have been obtained some new information parameters, such as intensity of the reflected signal from the object, duration of the leading and trailing edges of the video pulse reflected from the underlying surface of the Earth and located on it objects, distance from the aircraft to the under-lying surface of the Earth. It is proposed to construct a relief map of a section of the underlying surface of the Earth and located on it objects in terms of a horizontal trajectory or a trajectory close to it. The paper analyzes a method for constructing a radar contrast map based on the in-tensity of the signals reflected from the underlying surface of the Earth and located on it ob-jects. There have been proposed such information parameters as the height of an object and an estimate of the height of the slope of the underlying surface of the Earth which are independent of external conditions and which can be considered as the main elements for building a digital three-dimensional map of the area. The obtained results can be considered as a source material for theoretical and practical research in the sphere of development of an all-weather high-precision navigation radar system.