Abstract
The author made the tide predictions for 53 tide gage stations on the coast of Japanese Islands by means of 30 constituents, the tidal constants of which were taken by the same harmonic analysis technique, and investigated the accuracy and the natures of errors in predictions using the power spectrum of the residuals.
For stations on the coast directly facing the open sea, the predictions amount to about 95% of the astronomical tides. In general this will be satisfactory but more exact predictions are needed for such coasts as that of Ariake Bay where the tide range is more than four meters. Especially in Osaka Bay and the Inland Sea, the accuracy of the predictions is less under the influence of tidal non-linear interactions, and the predictions could represent only abut 90% of the astronomical tides. The nature of predictional error is clarified by means of the power spectrum of the residuals.
