激光雷达探测水体光学特征参数的方法分析

大气与环境光学学报 ›› 2018, Vol. 13 ›› Issue (1): 59-64.

激光雷达探测水体光学特征参数的方法分析

李晓龙1,2*，李杰2，张冰3，陈永华1，赵朝方2，刘智深2

(1. 中国科学院海洋研究所，山东青岛 266071;
2. 中国海洋大学信息科学与工程学院，山东青岛 266100;
3. 青岛市光电工程技术研究院，山东青岛 266109 )

收稿日期:2016-10-19 修回日期:2017-01-25 出版日期:2018-01-28 发布日期:2018-02-06
通讯作者: 李晓龙 (1985-)，男, 汉族，山东临沂人，工程师，博士，主要从事海洋信息探测技术方面的研究。 E-mail:lixiaolong@qdio.ac.cn
作者简介:李晓龙（1985-），男,山东临沂人，高级工程师，博士，主要从事海洋信息探测技术方面的研究。
基金资助:
Supported by National Natural Science Foundation of China (国家自然科学基金, 61505221), Science Fund for Technology Strategic Pilot of the Chinese Academy of Sciences (中科院先导专项, XDA11040306), National Science and Technology Major Project of the Ministry of Science and Technology of China (科技重点专项, 2016YFC1402602)

Analysis of Detection Inversion of Water Optical Characteristics by Lidar

LI Xiaolong1,2*, LI Jie2, ZHANG Bing3, CHEN Yonghua1, ZHAO Chaofang2, LIU zhishen2

(1 Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China;
3 Qingdao Academy for Opto-Electronics Engineering, Qingdao 266109)

Received:2016-10-19 Revised:2017-01-25 Published:2018-01-28 Online:2018-02-06
Contact: 李晓龙 (1985-)，男, 汉族，山东临沂人，工程师，博士，主要从事海洋信息探测技术方面的研究。 E-mail:lixiaolong@qdio.ac.cn
About author:李晓龙（1985-），男,山东临沂人，高级工程师，博士，主要从事海洋信息探测技术方面的研究。
Supported by:
Supported by National Natural Science Foundation of China (国家自然科学基金, 61505221), Science Fund for Technology Strategic Pilot of the Chinese Academy of Sciences (中科院先导专项, XDA11040306), National Science and Technology Major Project of the Ministry of Science and Technology of China (科技重点专项, 2016YFC1402602)

摘要/Abstract

摘要：

多次散射是影响激光雷达探测水体光学特征参数（包括吸收系数a，衰减系数c，漫射衰减系数K_d）的重要因素，而视场（field of view, FOV）是造成接收回波中多次散射比重差异的关键参数。研究基于Mclean-Walker海洋激光雷达模型，引入接收视场参数q_rcvr，分别针对船载、机载和星载平台激光雷达进行探测回波计算，假设其探测高度依次为10 m、300 m和7´10⁵ m，在接收视场变化情况下分析多次散射因子对反演水体光学特征参数的影响。结果表明，利用水体中激光散射回波反演水体光学特征参数的方法中，假定激光准直入射，q_rcvr与探测高度H是影响反演结果的直接因素，激光雷达衰减系数K_lidar的物理意义随之变化，当q_rcvr近似为0时K_lidar反演值为衰减系数c，随q_rcvr´H增大，K_lidar反演值逐渐接近于漫射衰减系数K_d。

关键词: 激光雷达, 水体光学特征, 多次散射, 视场；

Abstract:

Multiple scattering is an important factor for measuring water optical characteristic parameters (including absorption coefficient a, attenuation coefficientc, diffuse attenuation coefficient K_d) by Lidar. Meanwhile, Field of View (FOV) is a key parameter which affects the proportion of multiple scattering in receiving echoes. In this study，a parameter of FOV (q_rcvr) is introduced into the inversion method of water optical properties by ocean Lidar based on the Mclean-Walker model. In the cases of shipboard, airborne and spaceborne platforms at the height of 10 m, 300 m, 7´10⁵ m respectively, scattering echoes are calculated according to the Lidar theory. The inversion of water optical parameters is analysed with multiple scattering factor under different FOVs. It is shown that assuming that the incident laser of highly collimated, q_rcvrand detecting height H are critical factors which influence inversion results in the method for obtaining water optical parameters from laser scattering echo. It is worth noting that the physical meaning of the Lidar attenuation coefficient K_lidarchanges with the factors. K_lidar can be considered as c when q_rcvr is approximately 0. And K_lidar gradually approaches K_d with the increase of q_rcvr´H.

Key words: lidar, water optical characteristics, multiple scattering, field of view

中图分类号:

TN958

李晓龙李杰张冰陈永华赵朝方刘智深. 激光雷达探测水体光学特征参数的方法分析[J]. 大气与环境光学学报, 2018, 13(1): 59-64.

LI Xiao-Long, LI Jie, ZHANG Bing, CHEN Yong-Hua, DIAO Chao-Fang, LIU Zhi-Shen. Analysis of Detection Inversion of Water Optical Characteristics by Lidar[J]. Journal of Atmospheric and Environmental Optics, 2018, 13(1): 59-64.

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