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Based on the comparative analysis of the known methods of noise suppression the ratios for the angular measurements are obtained. A mathematical model experiment to estimate the dependence of measurement error on the relative position of interference source and useful signal has been conducted. The modified method of interference compensation is tested experimentally. The analysis of obtained angular measurements for the considered methods shows that the modified method of compensation allows obtaining more precise estimates. The analyzed methodsallow considerably eliminating the useful signal from the antenna additional channel which reduces errors of angular misalignment.To determine the degree of the radar error analytically is not always possible, and in future comparison of the effectiveness of various methods of interference compensation will be expected to conduct by means of mathematical model-ing of radar closed contour.