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. 2020 May 8;10:7829. doi: 10.1038/s41598-020-64673-2

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© The Author(s) 2020

Open Access This 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 license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license 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 license, visit http://creativecommons.org/licenses/by/4.0/.

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Relationship between sky brightness measured on the ground and satellite radiance observation for different sizes of pixel agglomeration for the VIIRS data. In the top plots, the VIIRS image data has been averaged over a pixel size of 15″ (arcseconds), in the middle plots 30″, and in the bottom plots 60″. In all cases, the relationship is strongest using the high resolution data. In the left plots, the green circle represents the dimmer Gaussian peak, and the red circles the brighter Gaussian peak. The right hand plots show the same result using a non-binned color coded density plot with a Gaussian filter. The two dashed lines have the same slope as the blue fit, and are shown for comparison purposes.