3172 20170616095200.0 DATASET-2017-0019 Clette, F. 12-month Sunspot Number forecasts 2016 Monthly predictions of the sunspot number by Standard Curve and Combined methods + Kalman filter optimization World Data Center SILSO, Sunspot Index and Long-term Solar Observations , 1 - 12/2016 STCE olivier.lemaitre@observatoire.be http://www.sidc.be/silso/datafiles DATASET