000008095 001__ 8095 000008095 005__ 20260320153751.0 000008095 037__ $$aDATASET-2026-0025 000008095 100__ $$aClette, Frédéric 000008095 245__ $$aUSET whole-disk images - L0 000008095 260__ $$c2023 000008095 520__ $$aThe USET station hosts since 2002 three modern telescopes equipped with digital cameras recording full-disk images of the Sun in three different parts of the visible-light spectrum: broad-band white-light to observer the photosphere, and two telescopes with narrow-band filters (H-alpha line at 656.3 nm and Ca II K line at 393.37 nm) to monitor the chromosphere, where solar eruptive phenomena can be detected. The image file format is FITS. 000008095 594__ $$aSTCE 000008095 6531_ $$aUSET 000008095 6531_ $$aSunspot ; Photosphere ; Chromosphere 000008095 700__ $$aBechet, Sabrina 000008095 700__ $$aLemaître, Olivier 000008095 700__ $$aBoulvin, Olivier 000008095 700__ $$aLefèvre, Laure 000008095 700__ $$aVandekerckhove, Joan 000008095 8560_ $$fsabrina.bechet@ksb-orb.be 000008095 85642 $$ahttps://www.sidc.be/uset/data/cameras/output_img/FTS/L0/ 000008095 980__ $$aDATASET