体散射函数测量技术定标方法研究进展  

Research progress in the calibration method of the volume scattering function measurement technique

作　　者：刘聪 李彩[1,3] LIU Cong;LI Cai(State Key Laboratory of Tropical Oceanography,South China Sea Institute of Oceanology,Chinese Academy of Sciences,Guangzhou 510300,China;University of Chinese Academy of Sciences,Beijing 100049,China;Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou),Guangzhou 511458,China)

机构地区：[1]中国科学院南海海洋研究所热带海洋环境重点实验室,广州510300 [2]中国科学院大学,北京100049 [3]南方海洋科学与工程广东省实验室,广州511458

出　　处：《遥感学报》2023年第2期285-298,共14页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学基金(编号:41976181,41976172,41976170);广州市科技计划重点项目(编号:201707020023);南方海洋科学与工程广东省实验室(广州)人才团队引进重大专项项目(编号:GML2019ZD0305);热带海洋环境国家重点实验室自主研究项目(编号:LTOZZ2003)。

摘　　要：体散射函数描述了光被水体散射后的角度分布特性,是海水固有光学特性之一,在水色遥感、生物光学特性及海气交互过程研究等光学海洋学研究及应用领域具有十分重要的意义。基于其强方向性、大动态范围、后向散射微弱等特点,体散射函数测量技术定标方法及应用研究至今仍在不断探索进步中。伴随体散射函数测量技术的发展,相继出现了基于散射体及散射通量的定标方法、基于漫射体与传感器响应权重函数的定标方法以及基于标准物质与传感器响应权重函数的定标方法等3大类体散射函数定标方法。相较于基于散射体及散射通量的定标方法,基于漫射体与传感器响应权重函数的定标方法可有效解决散射体估算难度大等问题,但更适用于宽视场角的后向散射仪;基于标准物质与传感器响应权重函数的定标方法极大简化了定标过程,且不受散射角度范围的限制。可以预见,上述3大类体散射函数定标方法的变通和组合方案是未来很长一段时间的主要定标方法,而基于标准物质与传感器响应权重函数的定标方法将是未来体散射函数最有优势的定标方法。本文以水体体散射函数定标方法为主线,归纳总结了国内外水体体散射函数定标、测量以及应用研究进展,并对未来体散射函数定标方法的发展趋势进行展望。The Volume Scattering Function(VSF)is an important Inherent Optical Property(IOP)of seawater,which is a critical and fundamental parameter to describe the angular distribution of the scattering of incident light by water.In particular,the VSF has a significant importance in the field of ocean color remote sensing,atmosphere-sea interaction,eco-disaster alerting.Due to a strong directional distribution characterized by a large dynamic range in signal in the whole scatter directions and faint backscattering signal,the VSF measurement and calibration are complex and the research is still in the process of exploration and progress.In this paper,the research progress of calibration method and measurement technology of VSF has been summarized,and the development tendency of the VSF calibration method has been predicted.Since the birth of the first backscattering in situ measurement instrument in the 1930s,the calibration methods of the VSF measurement improved gradually with the development of measurement techniques.There are three main methods for calibrating the VSF measurement:the first is based on the estimation of the scattering volume and the scattering flux,the second is based on a diffusing target throughout the sample volume to obtain the sensor response weighting function,and the third is based on the Mie theory and the standard solution or particles to obtain the sensor response weighting function.For the first calibration method,the scattering volume is generally calculated based on the optical and mechanical structures with the plausible assumptions,and the scattering flux can be obtained by the response of each scattering sensor to a Lambertian target as a function of distance,this method is limited in the range of angles due to the large error in the estimation of scattering volume of the forward small angle and the backward near 180°.For the second one,the core of this method is the obtaining of the detector’s weighting function,and it is not modeled by the structure parameters of the instrument,but

关 键 词：体散射函数 定标方法 MIE散射 权重函数 固有光学特性 水色遥感 

分 类 号：P2[天文地球—测绘科学与技术]