Weekly sea level at the station SMKUF1 on January 2008. (a). x_smkf1_2008() in the 1st week in Jan. 2008. (b). x_smkf1_2008() in the 2nd week in Jan. 2008. (c). x_smkf1_2008() in the 3rd week on January 2008. (d). x_smkf1_2008() in the 4th week in Jan. 2008.