Enhance field water-color measurements with a Secchi disk and its implication for fusion of active and passive ocean-color remote sensing.
Enhance field water-color measurements with a Secchi disk and its implication for fusion of active and passive ocean-color remote sensing.
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DOI：
10.1364/ao.57.003463
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发表时间：
2018-05
期刊：
影响因子：
1.9
通讯作者：
Z. Lee;S. Shang;K. Du;Bingyi Liu;Gong Lin;Jianwei Wei;Xiaolong Li
中科院分区：
文献类型：
--
作者：
Z. Lee;S. Shang;K. Du;Bingyi Liu;Gong Lin;Jianwei Wei;Xiaolong Li
Inversion of the total absorption (a) and backscattering coefficients of bulk water through a fusion of remote sensing reflectance (Rrs) and Secchi disk depth (ZSD) is developed. An application of such a system to a synthesized wide-range dataset shows a reduction of ∼3 folds in the uncertainties of inverted a(λ) (in a range of ∼0.01-6.8 m-1) from Rrs(λ) for the 350-560 nm range. Such a fusion is further proposed to process concurrent active (ocean LiDAR) and passive (ocean-color) measurements, which can lead to nearly "exact" analytical inversion of an Rrs spectrum. With such a fusion, it is found that the uncertainty in the inverted total a in the 350-560 nm range could be reduced to ∼2% for the synthesized data, which can thus significantly improve the derivation of a coefficients of other varying components. Although the inclusion of ZSD places an extra constraint in the inversion of Rrs, no apparent improvement over the quasi-analytical algorithm (QAA) was found when the fusion of ZSD and Rrs was applied to a field dataset, which calls for more accurate determination of the absorption coefficients from water samples.
