The series analysed consists of 660 15 sec observations of the water level in a rock channel on the Wellington coast. Both correlogram and periodogram were employed in an attempt to isolate possible discrete components of the spectrum and to characterise the continuous component....
Whittle, P.. 1954. "The statistical analysis of a seiche record." Journal of Marine Research 13, (1). https://elischolar.library.yale.edu/journal_of_marine_research/805