The Correlation of Sunspot Data

摘要

This paper employ the detrended fluctuation analysis method to investigate the properties of the sunspot time series. The data is downloaded from SIDC's website observed from January, 1749 to March, 2009 through about 260 years. The different scaling exponents estimated by R/S method and DFA method indicate the different correlation in the sunspot data. The appearance of crossovers show the periodic or other characteristic exists in the signals.