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The top documents tagged [standard telescope]
Documents
1 The History of the Sunspot Number Leif Svalgaard Stanford University, California, USA AOGS, Singapore, August 2015 WSO
221 views
Documents
1 Geomagnetic Calibration of Sunspot Numbers Leif Svalgaard HEPL, Stanford University SSN-Workshop, Sunspot, NM, Sept. 2011
221 views