针对机载激光雷达信号Fernald前向反演方法要求准确得到标定值的问题, 提出了一种新的定标方法：在机载激光雷达探测得到的各条大气回波信号廓线中, 使用一条已知其大气气溶胶后向散射系数垂直分布的廓线, 通过机载激光雷达方程来确定出其他各条回波信号廓线上的大气气溶胶后向散射系数标定值。模拟分析和实验验证了这种定标方法的可行性, 用其标定值反演出的大气气溶胶后向散射系数垂直廓线是较为合理准确的; 误差分析表明由该定标方法反演的大气气溶胶后向散射系数相对误差在20%以内。这种定标方法是可以运用于机载激光雷达信号Fernald前向反演的。

For Fernald forward inversion of airborne lidar signals require an accurate calibrating value, a new calibration method was put forward. Using lidar equation, atmospheric backscattering signal profiles, as well as a known aerosol backscattering coefficient profile, the calibrating values of other signal profiles are determined. Simulation and observation results indicate its feasibility. The aerosol backscattering coefficient profiles inversed by the calibrating value, which is determined by the calibration method, are relatively veracious, and the relative error of aerosol backscattering coefficient caused by the method is less than 20%. It is considered that the calibration method can be applied to Fernald forward inversion of airborne lidar signals.