MERIS PERFORMANCE IN THE EAST CHINA SEAS : EVALUATION OF ATMOSPHERIC CORRECTION AND OPTICAL INVERSION ALGORITHMS
MERIS PERFORMANCE IN THE EAST CHINA SEAS : EVALUATION OF ATMOSPHERIC CORRECTION AND OPTICAL INVERSION ALGORITHMS
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发表时间：
2007
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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
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作者：
He Ming-xia;Shuangyan He;Lianbo Hu;Yunfei Wang;Qian Yang;Tinglu Zhang;Wenzhong Chen;J. Fischer;Z. Lee;Chuanmin Hu
利用东中国海域的ENVISAT MERIS数据计算了可见光波段的光谱遥感反射率(RRS(λ)，sr)，并与2003年至2007年的同期现场观测结果进行了比较。结果表明，FUB插件和标准MERIS二级数据普遍高估了RRS(λ)，特别是在蓝色部分，而FUB插件显示出与标准MERIS L2数据相比在精度上的显著提高。MERIS和原位RRS(λ)分别被用作准解析算法的输入，以求出不同水体成分(浮游植物、有色有机物和碎屑)的吸收系数，并与现场测定的吸收系数进行比较。与MERIS L2数据相比，FUB导出的吸收略有改善。与MERIS RRS(λ)相比，原位RRS(λ)的吸收明显改善。对基于RRS(λ)的扩散衰减系数K490(M)算法进行了调整，加入了一个RRS(670)项，取得了更好的结果。
Spectral remote sensing reflectance in the visible (Rrs(λ), sr) was derived from ENVISAT MERIS data over the East China Seas, and compared with those determined from concurrent in situ measurements between 2003 and 2007. The results showed that both the FUB plug-in module and the standard MERIS Level-2 data generally overestimated Rrs(λ), particularly in the blue, while FUB plug-in shows a significant improvement in accuracy compared to the standard MERIS L2 data. The MERIS and in situ Rrs(λ) were respectively used as input to a quasi-analytical algorithm to derive absorption coefficients of the various water constituents (phytoplankton, colored organic matter and detritus), and compared with those determined in situ. There was slight improvement in the FUB-derived absorption as compared with that from the MERIS L2 data. The derived absorption from in situ Rrs(λ) were apparently improved compared with those derived from MERIS Rrs(λ). The Rrs(λ)-based algorithm for the retrieval of diffuse attenuation coefficient, K490 (m), was adjusted to include a term Rrs(670), which showed the better results.