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Proceedings Paper

Extracting turbulence information from echo signal of micro-pulse lidar
Author(s): Zhi-bo Ni; Hong-hua Huang; Hai-ping Mei; Chao-long Cui; Yin-bo Huang; Wen-yue Zhu; Chi-dong Xu; Rui-zhong Rao
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Paper Abstract

Based on the method of measuring turbulence profile with lidar, equations of backscattering speckle sizes induced by aerosol and turbulence are given. According to the relationship between diaphragm aperture and sizes of speckles, fluctuations of normalized variance of echo signal can be separated into dilution regime of aerosol and turbulence, turbulent regime and smoothed regime. The feasibility of measuring turbulent profile with MPL-A1 lidar is discussed, and experiments are performed in horizontal direction. According to the values of SNR and values of normalized variance of echo signal, effective measuring distances of this lidar are determined. The variations of normalized variance and those of calculated results of scintillation index, which are both depending on propagation distance, are compared. Results show that, although the values of normalized variance are only 10 percent of the latter, there is much comparability, especially during nighttime. Temporal variations of normalized variance, which are calculated at 1950m during daytime and at 4500m during nighttime, are compared with those of refractive index structural constant. Analyses show that, the fluctuant ranges of them are all about one magnitude. Although there are a small quantity of time differences between them, total tendencies are comparable.

Paper Details

Date Published: 29 August 2009
PDF: 7 pages
Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73822L (29 August 2009); doi: 10.1117/12.835496
Show Author Affiliations
Zhi-bo Ni, Anhui Institute of Optics and Fine Mechanics (China)
Hong-hua Huang, Anhui Institute of Optics and Fine Mechanics (China)
Hai-ping Mei, Anhui Institute of Optics and Fine Mechanics (China)
Chao-long Cui, Anhui Institute of Optics and Fine Mechanics (China)
Yin-bo Huang, Anhui Institute of Optics and Fine Mechanics (China)
Wen-yue Zhu, Anhui Institute of Optics and Fine Mechanics (China)
Chi-dong Xu, Anhui Institute of Optics and Fine Mechanics (China)
Rui-zhong Rao, Anhui Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 7382:
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging

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