基于激光强度分布的激光雷达重叠因子计算及其敏感性分析

Overlap Factor Calculation Method Based on Laser Intensity Distribution and its Sensitivity Analysis

激光雷达系统是一种功能强大的遥感设备,具有较高的时空分辨率和精度,广泛应用于区域或全球尺度的大气探测。重叠因子是影响激光雷达系统探测近距离大气的一个重要因素,对其进行精确的计算有利于获得准确探测结果。基于激光强度分布的重叠因子计算方法具有简单实用的特点,可应用于任意指定激光强度分布和不同系统参数的激光雷达重叠因子求解。利用该算法对重叠因子进行了计算,并与实验法测量得到的重叠因子进行了对比分析。重点分析了重叠因子对各个参数的敏感性。分析结果为指导激光雷达的系统调试、优化配置和误差控制提供了一定的参考。

Lidar system is a powerful equipment of remote sensing with high spatial and temporal resolution and accuracy, which is widely used in atmospheric detection in regional or global scales. Overlap factor is an important factor that affects atmosphere detection with lidar system at near range. The accurate calculation is helpful to obtain more accurate detecting results. The overlap factor calculation method based on the laser intensity distribution is simple and practical. The algorithm not only applies to any specific laser intensity distribution, but also to results simulation with different initial parameters setting. Overlap factors are calculated with this algorithm, and calculation results are compared with experimentally measured overlap factor derived from the lidar signal. Moreover, we analyzed the influences of the system parameters on overlap factor and the sensitivity of the overlap factor. The results orovide a certain reference to svstem debuetin., ontimization configuration and orrnr contrcol of lidnr