测角精度是单脉冲二次监视雷达的重要指标偏离瞄准轴角(OBA)表反映了天线和差比与目标偏离瞄准轴角度间的关系，是单脉冲二次雷达能够正确测量目标角度的关键所在。针对实际工程中雷达原始OBA表数据无法直接获取，以及无法实际测量天线参数的情况，文中提出了基于OBA表自适应生成方法的单脉冲二次雷达角度测量方法，详细介绍了该方法的基本原理和工程实现步骤。二次雷达录取设备实际工程中的现场联试结果表明：通过误差统计的方法自适应生成的OBA表，为目标方位的提取提供了较精确的修正数据，大大地提高了目标的方位测量精度。

The precision of degree measure is the key quota for monopulse secondary suneillancerada(MSSR), off boresight angle(OBA) indicates the relation between the sum-difference ration(SDR) of antenna and the departure for target with the point degree, so OBA is the key point for degree measure of target accurately. For the situation that original OBA radar data table could not be obtained directly and the antenna parameters could not be measured, degree measure of MSSR based on OBA adaptive build method is proposed in this paper, the basic principles and the implementation steps in the project is described in detail. The result that secondary radar actually works in the field shows that, the OBA table generated by the adaptive error statistics provides a more accurate correction data to extract the target orientation, and greatly improve the measurement accuracy of target position.

TN911.7