差分吸收激光雷达中二个接收通道的几何因子是不完全相同的,这会导致反演出的污染物浓度在近距离范 围内存在一定的偏差。在分析激光雷达通道几何因子形成的基础上,提出用通道几何因子比来修正上 述偏差,并给出了通道几何因子比的测量新方法。实验结果表明,这一修正方法是可靠的,实用的。

The geometric factors of two receiver channels in differential absorption lidar are not exactly the same, and result in certain bias in near range for retrieval pollutant density. Based on the analysis of formation of channal geometric factor, the ratio of channel geometric factors is proposed for correction, and the method of measuring the ratio of channel geometric factors is introduced. Experimental results show that this correction method is reliable and practical.