Experimental determination of the lidar overlap function in differential absorption lidar

Abstract

Abstract:

The lidar overlap function describes the overlap between the laser beam and the receiver of field of view in differential absorption lidar. It is an important system parameter in differential absorption lidar. In view of this fact, this work presents an experimental determination method of the lidar overlap function based on the comparison of aerosol scattering ratio profile derived from the signals measured by differential absorption lidar and Mie lidar simultaneously. The approach provide a means to determine the lidar overlap function without an explicit knowledge of all lidar system parameter, such as the telescope diameter, the laser beam divergence, the telescope of field of view et al. The application of the proposed methodology could reduce the ozone measurement error of differential absorption liar and improve the potential of differential absorption lidar to investigate the spatial and temporal distribution characteristics of ozone.

Key words: differential absorption lidar, Mie lidar, lidar overlap function, aerosol correction, tropospheric ozone

Fan Guangqiang, Liu Jianguo, Zhang Tianshu, Zhao Xuesong, Dong Yunsheng, Lu Yihuai, Liu Wenqing. Experimental determination of the lidar overlap function in differential absorption lidar[J]. J4, 2013, 30(1): 93-97.

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