Fig. 1.
Set of images to exemplify how degradation affects the AIA channels. The two sets are composed of seven images from different EUV channels. From left to right: AIA 94 Å, AIA 131 Å, AIA 171 Å, AIA 193 Å, AIA 211 Å, AIA 304 Å, and AIA 335 Å. Top row: images from 13 May 2010, and bottom row: images from 31 August 2019, without correction for degradation. The 304 Å channel images are in log-scale because the degradation is severe.
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