Hi everyone! I’m using Sentinel-2 images. Well, I have used used iCor (as well as Sen2Cor and C2RCC) ir order to perform atmospheric correction of Sentinel-2 images of a Case 2 tropical estuary in Brazil. Before that, my research group obtained in situ radiometric data over the water (on various points) so we could make comparisons (correlation graphs):
Bottom-of-atmosphere Remote sensing reflectance (after correction) vs In situ Remote sensing reflectance.
Correlation graphs did not yield any good R² - either for iCor, Sen2Cor or iCor corrected images.
- all data: 20°< SZA < 38°:
But… when I started filtering points by Sun Zenith Angles , R2 started to increase.
I would like to know authors who have already addressed the influence of Sun Zenith Angle in reflectance retrieval (what I know is that Sentinel-2 is more likely to be affected by sunglint but I don’t know why) . I really want to filter that data with SZA but I don’t know anyone who did the same as I did.