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分析测向距离选择应考虑的因素，从测向的原理及测向误差引起的机理入手，通过对测向天线阵接收信号来波的非平面性所引起的测向误差理论分析和计算，给出了典型条件下的测向距离和测向误差的图表和关系曲线。以此为基础，提出了测向距离选择的原则与方法。为测向精度试验中测向距离的选择提供了科学的依据。
This paper analyzes the factors that should be considered in the choice of DF distance, starts with the principle of DF and the mechanism of DF errors. By theoretical analysis and calculation of the DF errors caused by the non-planarity of the received signals of the DF antenna array, Under the typical conditions of the DF distance and direction error of the chart and the relationship curve. Based on this, the principles and methods of direction finding distance selection are proposed. It provides a scientific basis for choosing the DF distance in the test of DF accuracy.