Spectral relationships for atmospheric correction. I. Validation of red and near infra-red marine reflectance relationships.
Spectral relationships for atmospheric correction. I. Validation of red and near infra-red marine reflectance relationships.
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DOI：
10.1364/oe.21.021162
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发表时间：
2013-09
期刊：
影响因子：
3.8
通讯作者：
C. Goyens;Cédric Jamet;Kevin Ruddick
中科院分区：
文献类型：
--
作者：
C. Goyens;Cédric Jamet;Kevin Ruddick
本研究对文献中发现的红光和近红外(NIR)光谱关系进行了广泛的概述，并用于约束当前大气校正(AC)算法中的红光或近红外建模方案，目的是改进浑浊水域中的离水反射率反演，ρw(λ)。然而，大多数这些光谱关系是用有限的数据集建立的，因此可能不是全局有效的，这解释了需要进行准确的验证工作。本文用ρw(λ)的混浊原位数据验证了光谱关系。红色中估计ρw(λ)的函数仅适用于中度浑浊的水域(ρw(λnir)10(-2))。这项研究的结果建议使用红色边界方程和多项式近红外函数来约束AC过程中的红色或近红外建模方案，目的是在当前AC算法失败的情况下改进ρw(λ)反演。
The present study provides an extensive overview of red and near infra-red (NIR) spectral relationships found in the literature and used to constrain red or NIR-modeling schemes in current atmospheric correction (AC) algorithms with the aim to improve water-leaving reflectance retrievals, ρw(λ), in turbid waters. However, most of these spectral relationships have been developed with restricted datasets and, subsequently, may not be globally valid, explaining the need of an accurate validation exercise. Spectral relationships are validated here with turbid in situ data for ρw(λ). Functions estimating ρw(λ) in the red were only valid for moderately turbid waters (ρw(λNIR) 10(-2)). The results of this study suggest to use the red bounding equations and the polynomial NIR function to constrain red or NIR-modeling schemes in AC processes with the aim to improve ρw(λ) retrievals where current AC algorithms fail.