| 光谱响应函数和带宽对光学复杂二类水体离水辐射反射率的影响 |
| 投稿时间：2012-02-22 修订日期：2012-03-01 点此下载全文 |
| 引用本文：沈 宏,沈 芳.光谱响应函数和带宽对光学复杂二类水体离水辐射反射率的影响[J].红外,2012,33(4):31~37 |
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| 基金项目:海洋公益性科研专项(200905001-9)；全球变化研究国家重大科学研究计划项目资助(2010CB951204)；国家自然科学(50939003)；国家自然科学基金创新群体项目(41021064)。 |
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| 中文摘要:在海洋水色遥感研究中，II类水体由于具有复杂的光学属性并受多种物质的共同影响，会使水色遥感数据的应用水平
和反演精度降低。从中分辨率成像光谱仪(Moderate Resolution Imaging Spectroradiometer, MODIS)和主题绘图仪(Thematic Mapper, TM)光
谱通道的光谱响应函数和带宽的角度出发，分析了其对光学复杂II类水体离水辐射反射率的
影响。结果表明，MODIS的光谱响应函数和带宽对离水辐射反射率的影响远小于TM相应通道对离水辐射反
射率的影响。通过进一步定量分析发现，光谱响应函数和带宽在不同通道和水体下对离水辐射反射率的影响程度不同。针对长江河口
三种不同的典型水体类型，利用TM通道的离水辐射反射率模拟了整个通道上的反射率。这样可以更明显地表征出通道内的水体光谱特性，消
除光谱响应函数和带宽的影响。 |
| 中文关键词:光谱响应函数 光谱带宽 II类水体 离水辐射反射率 |
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| Effect of Relative Spectral Response and Bandwidth on Water-Leaving Reflectance of Optically Complex Case II Waters |
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| Abstract:Due to the complex optical properties of case II water, the application and inversion accuracy
of water color remote sensing data can be reduced in the study of ocean water color remote sensing. The effect of
relative spectral response and bandwidth of MODIS and TM channels on the water-leaving reflectance of optically complex
case II water is analyzed. The analysis result shows that the effect of the relative spectral response and bandwidth
of MODIS channels on water-leaving reflectance is much less than that of the corresponding TM channels. In addition,
the quantitative analysis result shows that the relative spectral response and the bandwith have their different
effect on the water-leaving reflectance of different channels and water types. According to three typical types of water
at the mouth of Yangtze River, the water-leaving reflectance of the TM channels is used to simulate the reflectance
of the entire channels. Thus, the spectral properties of case II water are characterized more obviously and the
effect of the spectral response function and bandwidth is removed. |
| keywords:relative spectral response spectral bandwidth case 2 waters water-leaving reflectance |
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