000008039 001__ 8039
000008039 005__ 20260227155857.0
000008039 037__ $$aPOSTER-2026-0060
000008039 100__ $$aKalugodu, Chandrashekhar
000008039 245__ $$aRefining the Sunspot Number Series to SN V3: Challenges and Benefits for the Space Climate Community
000008039 260__ $$c2025
000008039 269__ $$c2025-10-31
000008039 520__ $$aThe International Sunspot Number (SN) remains affected by historical scale jumps such as the Waldmeier break, even after two major recalibrations. FARSuN (Findability and Accessibility of historical Raw Sunspot Numbers) tackles this by rebuilding the record from the ground up: collecting handwritten logs and tables from 1607–1980, digitizing them, and applying consistent metadata and validation. The reconstructed SN V3 will deliver traceable uncertainties, hemispheric indices, and open FAIR-compliant access, strengthening space climate studies, solar cycle prediction, and coupled Sun–Earth research.
000008039 594__ $$aNO
000008039 6531_ $$aInternational Sunspot Number
000008039 6531_ $$aSN V3
000008039 6531_ $$aFARSuN
000008039 6531_ $$aSolar activity reconstruction
000008039 6531_ $$aWaldmeier break
000008039 6531_ $$aHistorical sunspot observations
000008039 6531_ $$aSpace climate
000008039 6531_ $$aSolar cycle calibration
000008039 6531_ $$aData digitization
000008039 6531_ $$aFAIR data principles
000008039 700__ $$aLefèvre, Laure
000008039 700__ $$aMampaey, Benjamin
000008039 700__ $$aValliappan, Senthamizh Pavai
000008039 700__ $$aHayakawa, Hisashi
000008039 700__ $$aRitter, Christian
000008039 773__ $$tEuropean Space Weather Week 2025, Umea (Sweden)
000008039 8560_ $$fchandrashekhar.kalugodu@ksb-orb.be
000008039 8564_ $$s26478581$$uhttps://publi2-as.oma.be/record/8039/files/poster_v1.pdf
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000008039 980__ $$aCPOSTER