Performance evaluation of operational atmospheric correction algorithms over the East China Seas
Performance evaluation of operational atmospheric correction algorithms over the East China Seas
复制标题
东海业务大气校正算法的性能评估
DOI：
10.1007/s00343-016-5170-6
复制
发表时间：
2017-01
影响因子：
--
通讯作者：
Shuangyan
中科院分区：
文献类型：
--
作者：
He;Shuangyan
为了获得中国在轨和预定海色传感器的高质量业务数据产品，利用MERIS数据对两种业务大气校正算法(ESA MEGS 7.4.1和NASA SEADAS 6.1)在东中国海域的性能进行了评估。利用2002年5月至2009年10月期间的现场测量，验证了使用这两种算法反演的光谱遥感反射率(λ)、气溶胶光学厚度(Aot)和朗斯特姆指数(α)。通过严格的排除标准，获得了原位数据和MERIS数据之间的RR、AOT和α匹配。RRs(λ)的统计分析表明，在490-560 nm的光谱范围内，平均百分比差为9%-13%，在413 nm处观察到明显的高估(MPD>；72%)。AOT被高估了(MPD>；32%)，尽管ESA算法在蓝绿波段的表现优于NASA算法，但在红色近红外波段情况正好相反。欧空局算法(mpd=41%)明显低估了α的值，而NASA算法(mpd=35%)则没有被低估。为了阐明为什么美国国家航空航天局的算法在反演α方面表现得更好，我们绘制了α单次散射反照率密度的散点图。这些α-SSA密度散点图表明，美国国家航空航天局算法所使用的气溶胶模式对东太平洋地区的适用性要好于欧空局算法，尽管这两种气溶胶模式都不适用于东太平洋地区。这项研究的结果为数据用户和数据机构在使用业务数据产品和调查现有空调方案相对于ECS的改进方面提供了参考。
To acquire high-quality operational data products for Chinese in-orbit and scheduled ocean color sensors, the performances of two operational atmospheric correction (AC) algorithms (ESA MEGS 7.4.1 and NASA SeaDAS 6.1) were evaluated over the East China Seas (ECS) using MERIS data. The spectral remote sensing reflectanceRrs(λ), aerosol optical thickness (AOT), and Ångström exponent (α) retrieved using the two algorithms were validated using in situ measurements obtained between May 2002 and October 2009. Match-ups ofRrs, AOT, and α between the in situ and MERIS data were obtained through strict exclusion criteria. Statistical analysis ofRrs(λ) showed a mean percentage difference (MPD) of 9%–13% in the 490–560 nm spectral range, and significant overestimation was observed at 413 nm (MPD>72%). The AOTs were overestimated (MPD>32%), and although the ESA algorithm outperformed the NASA algorithm in the blue-green bands, the situation was reversed in the red-near-infrared bands. The value of α was obviously underestimated by the ESA algorithm (MPD=41%) but not by the NASA algorithm (MPD=35%). To clarify why the NASA algorithm performed better in the retrieval of α, scatter plots of the α single scattering albedo (SSA) density were prepared. These α-SSA density scatter plots showed that the applicability of the aerosol models used by the NASA algorithm over the ECS is better than that used by the ESA algorithm, although neither aerosol model is suitable for the ECS region. The results of this study provide a reference to both data users and data agencies regarding the use of operational data products and the investigation into the improvement of current AC schemes over the ECS.
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影响因子：
5.2
作者：
Y. Kaufman;G. Gobbi;I. Koren
通讯作者：
Y. Kaufman;G. Gobbi;I. Koren
影响因子：
3.6
作者：
MOREL, A
通讯作者：
MOREL, A
影响因子：
2.9
作者：
B. Bulgarelli;F. Mélin;G. Zibordi
通讯作者：
B. Bulgarelli;F. Mélin;G. Zibordi
DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
He Ming-xia;Shuangyan He;Lianbo Hu;Yunfei Wang;Qian Yang;Tinglu Zhang;Wenzhong Chen;J. Fischer;Z. Lee;Chuanmin Hu
通讯作者：
He Ming-xia;Shuangyan He;Lianbo Hu;Yunfei Wang;Qian Yang;Tinglu Zhang;Wenzhong Chen;J. Fischer;Z. Lee;Chuanmin Hu
影响因子：
1.9
作者：
Howard R. Gordon;Tao Du;Tianming Zhang
通讯作者：
Howard R. Gordon;Tao Du;Tianming Zhang