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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >Absorption coefficients of marine waters: expanding multiband information to hyperspectral data
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Absorption coefficients of marine waters: expanding multiband information to hyperspectral data

机译：海水吸收系数：将多波段信息扩展到高光谱数据

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摘要

For many oceanographic studies and applications, it is desirable to know the spectrum of the attenuation coefficient. For water of the vast ocean, an effective way to get information about this property is through satellite measurements of ocean color. Past and present satellite sensors designed for ocean-color measurements, however, can only provide data in a few spectral bands. A tool is needed to expand these multiband measurements to hyperspectral information. The major contributors to the attenuation coefficient are absorption and backscattering coefficients. The spectral backscattering coefficient can generally be well described with a couple of parameters, but not so for the spectral absorption coefficient. In this paper, based on available hyperspectral absorption data, spectral-transfer coefficients are developed to expand multiband absorption coefficients to hyperspectral (400-700 nm with a 10-nm step) absorption spectrum. The derived transfer coefficients are further applied to data from field measurements to test their performance, and it is found that modeled absorption matches measured absorption very well (/spl sim/5% error). These results indicate that when absorption and backscattering coefficients are available at multiple bands, a hyperspectral attenuation-coefficient spectrum can now be well constructed.
机译：对于许多海洋学研究和应用，希望知道衰减系数的频谱。对于广阔的海洋中的水，获取有关此属性信息的有效方法是通过对海洋颜色进行卫星测量。但是，过去和现在为海洋颜色测量而设计的卫星传感器只能提供几个光谱带中的数据。需要一种工具来将这些多波段测量扩展到高光谱信息。衰减系数的主要贡献者是吸收系数和反向散射系数。频谱后向散射系数通常可以用几个参数很好地描述，但对于频谱吸收系数则不能。在本文中，基于可用的高光谱吸收数据，开发了光谱传输系数，以将多波段吸收系数扩展到高光谱（400-700 nm，步长为10 nm）吸收光谱。导出的传递系数进一步应用于来自现场测量的数据以测试其性能，并且发现建模的吸收与测量的吸收非常匹配（/ spl sim / 5％误差）。这些结果表明，当在多个频带上都有吸收系数和反向散射系数时，现在可以很好地构建高光谱衰减系数频谱。

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