Sentinel 2 striping

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dias4268
Posts: 1
Joined: Thu Jun 30, 2022 8:46 am
company / institution: Pusan National University
Location: Busan, South Korea

Sentinel 2 striping

Post by dias4268 »

Hello, I am a beginner using polymer algorithm.

I am applying polymer on Sentinel-2 L1C for atmospheric correction.
However I got some striping result in the water reflectance result. You can see from my snapshot
Polymer Result.PNG
I was check on the original Sentinel-2 image, the stripe were exist on the original image.
my question is, is it possible using polymer to eliminate the stripe?

Thank you
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gbourdin
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Joined: Wed Nov 04, 2020 8:49 pm
company / institution: University of Maine
Location: Maine, USA

Re: Sentinel 2 striping

Post by gbourdin »

Hello,
To my understanding, polymer does not correct for stripping but you can try a de-striping algorithm:
I have personally never tried using this type of correction but according to the example presented in the paper, it should work fairly well.
Best,
Guillaume
jan.elkassar
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Joined: Sun Sep 30, 2018 6:34 pm
company / institution: Institute of Space Sciences - Freie Universität Berlin

Re: Sentinel 2 striping

Post by jan.elkassar »

To my knowledge the stripes are an artefact from the smile-effect that sensors like Sentinel2-MSI (or Sentinel3-OLCI) have. Its a bit different to the striping you have in e.g. MODIS images. But maybe the de-striping Guillaume proposes works there, too? I don't know why there is no official smile-correction for S2-MSI, yet. I'm not sure if it is easy to implement and correct for it, though... For OLCI Polymer has a smile correction, actually.

However, I think I heard that the smile effect of S2-MSI will be addressed soonish.
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fsteinmetz
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Re: Sentinel 2 striping

Post by fsteinmetz »

The striping in Sentinel-2 is due to the multiple detectors with a staggered configuration : the detection angles alternate across detectors (https://sentinels.copernicus.eu/web/sen ... instrument). Of course this is particularly visible in the sun glint. Polymer can eliminate some of these effects, but the results vary, and residuals are often visible. I don't know how the method mentioned by Guillaume would apply to this case.
Cheers, François
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