7278 20250109113539.0 CTALK-2025-0015 Lefèvre, Laure The sunspot number recalibration, an ongoing effort 2024 2024-10-04 STCE Bhattacharya, Shreya Mampaey, Benjamin Delouille, Véronique Ritter, Christian Space Climate 9, Nagoya, Japan laure.lefevre@ksb-orb.be Invited CTALKINVI