Fig. 3

a Autocorrelation function (ACF) plot of Jeju, Ara and Eorimok station. b Autocorrelation function (ACF) plot of Jindallaebat and Witsaeorum station
a Autocorrelation function (ACF) plot of Jeju, Ara and Eorimok station. b Autocorrelation function (ACF) plot of Jindallaebat and Witsaeorum station