A method for calculating errors in measuring the angular coordinates of a radar target presented as a multipoint model

The problem of determining errors in measuring angular coordinates (angular noise) of a radar target presented as a multipoint model is considered. A method for calculating errors in the angular coordinates of targets is proposed, which is based on determining the gradient of the phase field of the wave at the point of reception of reflected signals. Analytical relations have been obtained that make it possible to calculate the direction of arrival of waves with an arbitrary number and location of points in a multipoint target model. For various types of targets — low-flying, group and single targets with a different number of points, calculations of errors in the angles of arrival of radio waves were carried out. In this case, angular errors are understood as the deviation of the direction of arrival of reflected radio waves from the direction of the geometric center of the target. The analysis of the causes of abnormal errors in measuring angles for the considered cases of numerical calculations is carried out.