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The top documents tagged [number of spotsgroup]
How Well Do We Know the Sunspot Number? [And what we are doing to answer that question]
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1 History and Calibration of Sunspot Numbers Edward W. Cliver, AFRL Leif Svalgaard, Stanford Univ. Kenneth H. Schatten, a.i. Solutions IUGG XXV General
217 views
The Forgotten Sun
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Reconciling Group and International Sunspot Numbers
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