Sunspot number recalibration: The ~1840–1920 anomaly in the observer normalization factors of the group sunspot number

Author: Cliver Edward W.  

Publisher: Edp Sciences

E-ISSN: 2115-7251|7|issue|A12-A12

ISSN: 2115-7251

Source: Journal of Space Weather and Space Climate, Vol.7, Iss.issue, 2017-05, pp. : A12-A12

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Abstract