从国产机载双频激光雷达系统对地定位模型出发，分析对定位精度产生影响的各个因素，应用误差传播理论，推导该系统对地定位的综合误差模型。根据系统各传感器参数，对系统的理论定位精度进行仿真计算。对比分析机载雷达对地定位精度评定方法，设计了基于平面特征的对地定位精度评定方法，利用评定场飞行数据及高精度控制数据进行精度评价，结果表明，系统精度达到设计要求，评价方法简单可行。

Based on the localization model of domestic airborne dual-frequency LiDAR system, various factors that affect the positioning accuracy are analyzed, and the comprehensive accuracy evaluation model of the system is deduced by the error propagation law. According to the sensor parameters of the system, a simulated calculation is made for its theoretical positioning accuracy. The method of airborne radar's location accuracy assessment is analyzed for reference, through which a method to evaluate the accuracy of ground location based on planar features is designed. By using the airfield data and high precision control data to carry out the accuracy evaluation, the thesis gets the result that the accuracy of the domestic airborne dual-frequency LiDAR system meets the design requirement and the evaluation method is simple and feasible.