70 years of Sunspot Observations at Kanzelhöhe Observatory: systematic study of parameters affecting the derivation of the relative sunspot number

Werner Pötzi, Astrid M. Veronig, Manuela Temmer +3

Kanzelhöhe Observatory (KSO) was founded during World War II by the "Deutsche Luftwaffe" (German Airforces) as one station of a network of observatories, which should provide infor…