An electronic filter for tidal frequencies (25μHz)

Ronald Green, Paul Somerville

Research output: Contribution to journalArticlepeer-review


A digital low-pass filter has been constructed, the attenuation of which varies linearly with frequency. The range over which these desirable filter characteristics apply is not limited by the availability of capacitors and inductors of reasonable size as required by analog low-pass filters. The filter has been designed for the highcut pre-filtering of a long-period (e.g., diurnal) signal, which is a necessary process to be performed if aliasing is to be avoided, when the signal is to be digitised using a low sampling rate.

Original languageEnglish
Pages (from-to)684-689
Number of pages6
JournalNew Zealand Journal of Geology and Geophysics
Issue number3
Publication statusPublished - 1970
Externally publishedYes


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