J4 ›› 2011, Vol. 28 ›› Issue (1): 87-90.

• 激光应用 • 上一篇    下一篇

湍流强度廓线激光雷达测量的反演算法研究

马后永,靖旭,张守川,吴毅   

  1. 中国科学院大气成分与光学重点实验室,  安徽  合肥 230031
  • 收稿日期:2010-03-23 修回日期:2010-04-27 出版日期:2011-01-28 发布日期:2011-01-14
  • 通讯作者: 吴毅,(1960-),研究员,主要从事激光大气传输的研究。 E-mail:wuyi@aiofm.ac.cn
  • 作者简介:马后永 (1985-),从事激光雷达相关算法的研究。E-mail:mhy6156869@yahoo.com.cn,
  • 基金资助:

    中国科学院科技创新基金项目资助课题(CXJJ-245)

Inversion techniques for turbulence profile lidar

MA Hou-yong, JING Xu, ZHANG Shou-chuan, WU Yi   

  1. Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2010-03-23 Revised:2010-04-27 Published:2011-01-28 Online:2011-01-14

摘要:

湍流强度廓线激光雷达通过测量各层的大气相干长度来获得湍流强度廓线。从测量的大气相干长度直接反演湍流强度廓线会出现很大的噪声增益,因此本文介绍了一种通过求导并结合理查森迭代方法来反演湍流强度廓线,并对这种方法进行了数值模拟实验。文章通过反演两种典型系数下的Hufnagel-Valley(H-V)Cn2模式廓线,两参数下反演廓线和原始廓线的平均相对误差分别为7.8%和10.6%,结果表明该算法具有较高的精度。

关键词: 大气光学, 激光雷达, 反演算法, 数值模拟, 光学湍流

Abstract:

Turbulence density profile can be obtained by turbulence density profile lidar system through measuring a set of atmospheric coherence length. However, direct inversion from measured atmospheric coherence length data can result in a high noise gain. A new approach, which combines slope and Richardson method, has been developed and its numerical simulation were performed. By recovering two representative Hufnagel-Valley(H-V) Cn2 profiles, the average relative error between initial profile and recovery profile are 7.8%and 10.6% respectively. Numerical results demonstrate that this method has a good precision.

Key words: atmospheric optics, lidar, inversion, numerical simulation, optical turbulence

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