使用Sentinel Toolbox移除云层?


Answers:


13

ESA的Sen2cor工具箱可去除阴霾,卷云和云影,而不是浓密的云。它是在同一场景上执行的,而不是通过镶嵌进行的。

来自L2A算法文档的交流流如下:

在此处输入图片说明

因此,Sen2cor执行图像分类,并使用此层选择在哪里校正像素值。您可以查看文档以了解每个步骤中使用的方程式。

默认情况下L2A_GIPP.xml,阈值和选项是在GIP文件中设置的(),您可以将其从此文件中更改为覆盖默认设置,也可以从命令行调用它们:

<WV_Correction>1</WV_Correction>
<!-- 0: No WV correction, 1: only 940 nm bands, 2: only 1130 nm bands , 3: both regions used during wv retrieval, 4: Thermal region -->
<VIS_Update_Mode>1</VIS_Update_Mode>
<!-- 0: constant, 1: variable visibility -->
<WV_Watermask>1</WV_Watermask>
<!-- 0: not replaced, 1: land-average, 2: line-average -->
<Cirrus_Correction>1</Cirrus_Correction>
<!-- 0: no, 1: yes -->
<BRDF_Correction>0</BRDF_Correction>
<!-- 0: no BRDF correction, 1: , 2: ,11, 12, 22, 21: -->
<BRDF_Lower_Bound>0.22</BRDF_Lower_Bound>
<!-- In most cases, g=0.2 to 0.25 is adequate, in extreme cases of overcorrection g=0.1 should be applied -->

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