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Impact of Light Polarization on the Measurement of Water Particulate Backscattering Coefficient
其他题名光源偏振对水体颗粒后向散射系数测量的影响
Liu Jia1,2; Gong Fang1; He Xian-qiang1; Zhu Qian-kun1; Huang Hai-qing1; Gong, F
作者部门遥感技术与图像工程中心
2016
发表期刊SPECTROSCOPY AND SPECTRAL ANALYSIS
ISSN1000-0593
卷号36期号:1页码:31-37
产权排序2
摘要Particulate backscattering coefficient is a main inherent optical properties (IOPs) of water, which is also a determining factor of ocean color and a basic parameter for inversion of satellite ocean color remote sensing. In-situ measurement with optical instruments is currently the main method for obtaining the particulate backscattering coefficient of water. Due to reflection and refraction by the mirrors in the instrument optical path, the emergent light source from the instrument may be partly polarized, thus to impact the measurement accuracy of water backscattering coefficient. At present, the light polarization of measuring instruments and its impact on the measurement accuracy of particulate backscattering coefficient are still poorly known. For this reason, taking a widely used backscattering coefficient measuring instrument HydroScat6 (HS-6) as an example in this paper, the polarization characteristic of the emergent light from the instrument was systematically measured, and further experimental study on the impact of the light polarization on the measurement accuracy of the particulate backscattering coefficient of water was carried out. The results show that the degree of polarization(DOP) of the central wavelength of emergent light ranges from 20% to 30% for all of the six channels of the HS-6, except the 590 nm channel from which the DOP of the emergent light is slightly low (similar to 15%). Therefore, the emergent light from the HS-6 has significant polarization. Light polarization has non-neglectable impact on the measurement of particulate backscattering coefficient, and the impact degree varies with the wave band, linear polarization angle and suspended particulate matter (SPM) concentration. At different SPM concentrations, the mean difference caused by light polarization can reach 15.49%, 11.27%, 12.79%, 14.43%, 13.76%, and 12.46% in six bands, 420, 442, 470, 510, 590, and 670 nm, respectively. Consequently, the impact of light polarization on the measurement of particulate backscattering coefficient with an optical instrument should be taken into account, and the DOP of the emergent light should be reduced as much as possible.
文章类型Article
关键词Polarization Backscattering Coefficient Inherent Optical Properties Ocean Color Remote Sensing
学科领域Spectroscopy
WOS标题词Science & Technology ; Technology
DOI10.3964/j.issn.1000-0593(2016)01-0031-07
收录类别SCI ; EI
语种英语
WOS研究方向Spectroscopy
WOS类目Spectroscopy
WOS记录号WOS:000368043800007
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.opt.ac.cn/handle/181661/27795
专题遥感与智能信息系统研究中心
通讯作者Gong, F
作者单位1.State Ocean Adm, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Zhejiang, Peoples R China
2.Chinese Acad Sci, Xian Inst Opt & Precis Mech, Lab Remote Sensing & Intelligent Informat Syst, Xian 710119, Peoples R China
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GB/T 7714
Liu Jia,Gong Fang,He Xian-qiang,et al. Impact of Light Polarization on the Measurement of Water Particulate Backscattering Coefficient[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS,2016,36(1):31-37.
APA Liu Jia,Gong Fang,He Xian-qiang,Zhu Qian-kun,Huang Hai-qing,&Gong, F.(2016).Impact of Light Polarization on the Measurement of Water Particulate Backscattering Coefficient.SPECTROSCOPY AND SPECTRAL ANALYSIS,36(1),31-37.
MLA Liu Jia,et al."Impact of Light Polarization on the Measurement of Water Particulate Backscattering Coefficient".SPECTROSCOPY AND SPECTRAL ANALYSIS 36.1(2016):31-37.
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