5770 20230106133903.0 DATASET-2022-0020 Clette, Frédéric USET daily sunspot drawings (photosphere) 2021 STCE Bechet, Sabrina Lemaître, Olivier Lefèvre, Laure Boulvin, Olivier Vandekerckhove, Joan Bhattacharya, Shreya Vanden Broeck, Grégory sabrina.bechet@observatoire.be https://www.sidc.be/uset/searchFormDrawing.php DATASET