地基离轴拉曼-米激光雷达几何因子校正

A pure aerosol correction method was presented to improve the calibration precision of the geometric factor profile for ground-based Raman-Mie lidar. Firstly, the analytical expression and the effect factors on the estimation error were analyzed theoretically, and compared with the Raman-Klett repeat correction method. The experiment results show the insensitive property of the pure aerosol correction method to the estimation error of lidar ratio. Then the effect of the determined geometric factor profile on aerosol extinction coefficient profile was further discussed. The experimental results show that, the accuracy of the pure aerosol correction method can be improved by about 2 times compared with that of Raman-Klett correction method under the identical lidar ratio uncertainties. Moreover, the near-ground aerosol distribution can be well revealed by the pure aerosol correction method.