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. 2023 Jun 27;13:10391. doi: 10.1038/s41598-023-34436-w

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© The Author(s) 2023

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Left: Visible light RGB image of the full Copernicus Sentinel 2 chip that was pre-loaded onto the satellite for testing purposes. Sentinel 2 images are provided as public domain. Right: The water mask produced onboard by the linear model is overlaid as a purple-filled polygon that exhibits a particularly simple morphology, with fewer vertices than average. The grid-pattern on the water mask shows the processing tile boundaries. The image also includes a blank swath (in black) where there is no valid data. This chip was deliberately chosen to provide a high compression ratio, keeping data download costs to a minimum.