目标定位是光电转塔典型功能和任务之一，对其定位精度的考量也是转塔作战技术指标之一，针对该问题，从理论和仿真角度进行了分析。分析目标定位中用到的坐标系及其相互转换关系，给出光电转塔视轴反演、有源目标定位、无源目标定位的算法流程，通过仿真实验加以验证，考虑了定位过程中可能的随机误差来源，并分析是否采用均值滤波及其对定位结果的影响，最后通过Monte-Carlo分析计算了定位精度。分析结果表明：1）有源定位比无源定位的精度高，在仿真假设条件下，精度约提高1倍；2）均值滤波后，定位精度有较大提升（约提高15倍）；3）18 km距离时典型无源定位精度在80%置信度条件下约为39.4 m；4）统计直方图反映出80%置信度CEP半径及最大误差距离随载机位置、姿态、转塔视轴等（体现在目标载机距离上）不同参数的变化结果。

Target location is one of the typical functions and tasks of the photoelectric turret, and its location accuracy is also one of the operational technical indicators of the turret. This problem was analyzed from the angle of theory and simulation. Firstly, the coordinate systems used in target location and their mutual transformation relations were analyzed. Secondly, the algorithms flow of photoelectric turret optic axis inversion, active target location and passive target location were given. Thirdly, considering the possible sources of random errors in location, the algorithms were simulated and verified, and the location results with or without mean-filtering were evaluated. Lastly, the location accuracy was calculated by the Monte-Carlo method. The results show that: 1) active location is better than passive location (under the assumption of simulation, the longitude is increased by about 1 time); 2) after mean-filtering, the location accuracy is improved (about 15 time); 3) the typical passive location accuracy of about 18 km distance is about 39.4 m under the condition of 80% confidence; 4) the analysis results of statistical histogram show that the radius of CEP at 80% confidence of location accuracy and the change results of the maximum error distance with different parameters such as aircraft position, attitude and turret optic axis, etc (reflected in the target-carrier distance).