光谱学与光谱分析 |
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Analysis of Directional Reflectance Properties of Lake Taihu Using Multi-Angle Measurements |
LI Jun-sheng1, ZHANG Bing1*, SHEN Qian1, ZHANG Hao1, ZHANG Fang-fang1, 2, WANG Qiao3 |
1. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China 2. East China Normal University, Shanghai 200062, China 3. Satellite Environment Center, Ministry of Environmental Protection, Beijing 100094, China |
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Abstract The optical field above water is not isotropic. It is important to study the directional reflectance properties of the optical field above water, which is useful for building water quality parameters retrieving models by remote sensing. The bidirectional reflectance distribution function above oceanic waters has been well studied. However, the bidirectional reflectance distribution function above inland waters is still unresolved. The in-situ measured multi-angle remote sensing reflectance above water provides valuable data for studying directional reflectance properties above water. Unfortunately, such data is almost unavailable for inland waters due to the lack of of feasible instrument. Therefore, the authors designed and manufactured a specialized device to measure in situ multi-angle remote sensing reflectance involving with a spectrometer. We carried out an experiment in Lake Taihu to measure in situ multi-angle remote sensing reflectance data with this device. Then, we analyzed the directional properties of the remote sensing reflectance above water surface of Lake Taihu, and their effects on building water quality parameters retrieving models by remote sensing. Finally, we proposed a strategy for building water quality parameters retrieving models, which could reduce the directional effects of the optical field above inland waters.
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Received: 2013-01-17
Accepted: 2013-04-10
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Corresponding Authors:
ZHANG Bing
E-mail: zb@ceode.ac.cn
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