A New Method for Direct Measurement of Polarization Characteristics of Water-Leaving Radiation

被引：6

作者：

Liu, Jia ^{[1
,2
,3
,4
]}

Jia, Xinyin ^{[1
,3
]}

He, Xianqiang ^{[4
,5
]}

Wang, Yihao ^{[1
,3
]}

Zhu, Qiankun ^{[4
]}

Li, Haiwei ^{[1
]}

Zou, Chunbo ^{[1
]}

Chen, Tieqiao ^{[1
,3
]}

Feng, Xiangpeng ^{[1
]}

Zhang, Geng ^{[1
]}

Li, Siyuan ^{[1
]}

Hu, Bingliang ^{[1
]}

Pan, Delu ^{[4
]}

机构：

[1] Chinese Acad Sci, Xian Inst Opt & Precis Mech, Key Lab Spectral Imaging Technol, Xian 710119, Peoples R China

[2] Chinese Acad Sci, South China Sea Inst Oceanol, State Key Lab Trop Oceanog, Guangzhou 510301, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Minist Nat Resources, Inst Oceanog 2, State Key Lab Satellite Ocean Environm Dynam, Hangzhou 310012, Peoples R China

[5] Shanghai Jiao Tong Univ, Sch Oceanog, Shanghai 200240, Peoples R China

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2022年 / 60卷

基金：

中国国家自然科学基金;

关键词：

Field instrument; polarization; polarization-based algorithm; radiative transfer (RT) simulations; water-leaving radiance; SUSPENDED PARTICULATE MATTER; REMOTE-SENSING REFLECTANCE; OCEAN-ATMOSPHERE SYSTEM; POLARIMETRIC MEASUREMENTS; RADIANCE DISTRIBUTION; OPTICAL-PROPERTIES; MARINE PARTICLES; DIURNAL DYNAMICS; NEUTRAL POINTS; SATELLITE DATA;

D O I：

10.1109/TGRS.2021.3126926

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

The polarization characteristics of water-leaving radiation, which contain rich information on oceanic constituents, have often been neglected. Due to the lack of suitable instruments and practical difficulties in removing strong contamination by polarized skylight, direct measurement of the polarization of water-leaving radiation remains a challenge. In this study, we designed an above-water instrument (named POLWR) to directly measure the polarization of water-leaving radiation and examined its field application in Qiandao Lake, China. Results showed that the Stokes components of water-leaving radiance (L-w) measured by POLWR were consistent with the radiative transfer (RT) simulations, with a determination coefficient (R-2) and mean relative error of 0.67 and 18.86%, respectively. The Qiandao Lake results revealed that the degree of polarization (DOP) of L-w varied from 0.05 to 0.5 within the 412-865-nm range. Moreover, a good relationship between the polarized remote sensing reflectance (R-rsp), and DOP and chlorophyll-a (C-hla) concentration was found at 368 nm in this productive lake, indicating great potential for the inversion of oceanic constituents from polarization signals. With its small size and direct measurement ability, the POLWR instrument should be widely applicable and could help improve our understanding of the polarization characteristics of water-leaving radiation and the underwater light field.

引用

页数：14

共 90 条

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