Analyzing the effects of particle size on remotely sensed spectra: a study on optical properties and spectral similarity scale of suspended particulate matters in water.
Analyzing the effects of particle size on remotely sensed spectra: a study on optical properties and spectral similarity scale of suspended particulate matters in water.
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DOI：
10.1364/ao.52.000879
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发表时间：
2013-02
期刊：
影响因子：
1.9
通讯作者：
Yingcheng Lu;G. Zheng;Q. Tian;C. Lyu;Shaojie Sun
中科院分区：
文献类型：
--
作者：
Yingcheng Lu;G. Zheng;Q. Tian;C. Lyu;Shaojie Sun
颗粒大小是利用光学遥感数据确定水体中悬浮颗粒物(SPM)浓度的重要因素。在实验室对照实验中，我们用分光辐射计采集了五个不同粒径的SPM样品的反射光谱。基于光谱反射模型，推导了颗粒粒度分布与后向散射系数之间的理论关系式。整个SPM样品的后向散射系数可以使用不同子样的四个百分比的线性加权组合来计算。光谱相似尺度结果表明，SPM遥感的最佳光学波段和边界条件为颗粒大小和浓度。为了提高SPM浓度遥感模型的适用性和精度，可以通过光学遥感来评价颗粒的大小。
Particle size is an important factor for determining the concentration of suspended particle matter (SPM) in water using optical remotely sensed data. We collected reflectance spectra of five SPM samples with different particle sizes in a controlled laboratory experiment using a spectroradiometer. The theoretical relationship between particle size distributions and backscattering coefficient was deduced based on a spectral reflectance model. The backscattering coefficient of the complete SPM sample can be computed using the linear weighted combination of four percentages of different subsamples. The spectral similarity scale results indicate the optimal optical bands and boundary conditions for particle size and concentration of SPM remote sensing. The particle size can be evaluated by optical remote sensing to improve the applicability and precision of remote sensing models for SPM concentration inversion.