Last modified by Wai-Tim Ng on 2018/08/30 07:53
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From version < 6.1 >
edited by Wai-Tim Ng
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edited by Wai-Tim Ng
on 2018/08/30 07:53
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8 8  The [[**Sentinel-2 Level-2A**>>url:https://sentinel.esa.int/web/sentinel/user-guides/sentinel-2-msi/product-types/level-2a]] product provides Bottom Of Atmosphere (BOA) reflectance images derived from the associated Level-1C products. Each Level-2A product is composed of 100x100 km tiles in cartographic geometry (UTM/WGS84 projection). This correction was performed by applying the [[SEN2COR >>url:https://austriandatacube.eodc.eu/xwiki/bin/view/2.%20Terminology/3.5.%20Methodology/]]alogrithm and uses two main auxiliary data: the Radiative Transfer Look-Up Tables and the [[Digital Elevation Model>>url:https://austriandatacube.eodc.eu/xwiki/bin/view/2.%20Terminology/3.3.%20Datasets/]] (DEM). The algorithm includes cloud detection and scene classification followed by the retrieval of the Aerosol Optical Thickness (AOT) and the Water Vapour (WV) content from the L1C image. The Figure below compares both Sentinel-2 level 1C (left) and Level 2A (right) images.
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10 -[[image:https://austriandatacube.eodc.eu/xwiki/bin/download/2.%20Terminology/3.4.%20data%20processing%20levels/WebHome/atmocorr.JPG||alt="atmocorr.JPG"]]
10 +[[image:https://austriandatacube.eodc.eu/xwiki/bin/download/2.%20Terminology/3.4.%20data%20processing%20levels/WebHome/atmocorr.JPG||alt="atmocorr.JPG" height="329" width="689"]]
11 11  )))