机载侦察设备对目标定位时受到的影响因素较多，目标定位数据中存在的系统误差和随机误差会影响定位结果。提出采用圆概率误差处理目标定位数据时，需分析判断圆概率误差的不同适用条件。根据圆概率误差的定义和圆概率误差方程式的一般形式，推导了6种不同适用条件情况下的圆概率误差简化计算公式。用两种圆概率误差简化计算公式对某目标定位数据进行了对比计算分析，在采用适用条件下计算公式的数据处理精度优于095，达到了CEP定义50％的数据概率要求，能够准确分析处理机载侦察设备的目标定位结果。

Target positioning by airborne reconnaissance equipment is affected by many factors. The systematic errors and random errors in location data can affect the positioning results. We proposed that by using circular error probable(CEP) to process target location data, the different application conditions for CEP should be analyzed and judged. According to the definition of CEP and the general form of the CEP equation, we deduced the CEP simplified formulas under 6 different conditions and used two CEP simplified formulas to compare, calculate and analyze the location data of a target. Results show that the higher data processing accuracy 095 can be obtained using the formula under applicable condition, which meets the CEP-defined 50% probability data requirements and means the target location results from reconnaissance equipment can be analyzed accurately.