Optimization of base predictions using a Kalman filter
Standard method prediction (Kalman)
Combined method prediction (Kalman)
McNish & Lincoln method prediction (Kalman)
Data Credits: The Sunspot Number data can be freely downloaded. However, we request that proper credit to the WDC-SILSO is explicitely included in any publication using our data (paper article or book, on-line Web content, etc.), e.g.: "Source: WDC-SILSO, Royal Observatory of Belgium, Brussels".
For additonal information, contact Frédéric Clette (E_mail: Frederic.Clette@oma.be)
Royal Observatory of Belgium Av. Circulaire, 3 - B-1180 Brussels, Belgium