拉曼-米激光雷达污染环境下气溶胶散射系数反演

A modified inversion method for aerosol backscattering coefficient in the near-ground haze condition was proposed for rotational Raman-Mie lidar.In order to solve the problems of the intensity of the elastic scattering light to exceed the generally applicable suppression ratio of lidar system resulted from the surge of aerosol concentration in the near-ground haze condition, and some distortions of the Raman signals caused in the leaked elastic signal, a correction method was proposed to modify the abnormal signal with coefficient and considering the effect of atmospheric temperature on the aerosol backscatter inversion in addition.Experiment results show that, compared with the classic Raman-Mie method, the proposed method can improve the accuracy of the aerosol backscattering coefficient in the near-ground stable aerosol layer by about 20% so as to enhance the detecting performance of Raman-Mie lidar in polluted air condition.