Laser & Optoelectronics Progress, Volume. 59, Issue 4, 0429001(2022)
Lidar Slant-Range Visibility Retrieval Method Based on Effect of Multiple Scattering
Aiming at the effect of multiple scattering under low visibility weather conditions, an improved method is proposed for inverting slant-range visibility based on the multiple scattering lidar equation. First, the semi-analytical Monte Carlo method is used to calculate the ratio m of multiple scattering to single scattering based on the backscattering peak fitting the scattering phase function. Second, using the Collis method, the visibility level value is obtained, and the corresponding m value is substituted into the multiple scattering lidar equation. Then, the Fernald method is used to invert the extinction coefficient and solve the slant-range visibility. Experiments were performed on the echo signals of haze and heavy rain with different visibility levels detected by lidar, and the slant-range visibility results obtained using the fitting method in this paper and the commonly used Henyey-Greenstein (HG) function method were compared. The results show that the slant-range visibility difference is 10.9% under haze conditions and 5.6% under heavy rain conditions. The proposed method improves slant-range visibility accuracy inverted by the backscattering lidar.
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Xinglong Xiong, Jie Wang, Kui Liu, Yuzhao Ma. Lidar Slant-Range Visibility Retrieval Method Based on Effect of Multiple Scattering[J]. Laser & Optoelectronics Progress, 2022, 59(4): 0429001
Category: Scattering
Received: Jan. 29, 2021
Accepted: Apr. 7, 2021
Published Online: Jan. 25, 2022
The Author Email: Xiong Xinglong (xx_long@126.com)