WORLD TIDES and WORLD CURRENTS

WORLD TIDES© and WORLD CURRENTS© are MATLAB GUI programs for the analysis and prediction of tides and tidal currents in coastal oceans and estuaries. Up to 35 tidal constituents may be selected using a harmonic reduction in variance procedure similar to multiple regression analysis to obtain a customized set of tidal harmonic constants. Predictions can then be made at water level or water current stations that have these constants in any region of the world. Although the programs were written with oceanographers and ocean engineers in mind who often work in areas with a paucity of reliable field data, files up to one year in length may be analyzed. Companion programs ‘coopsR6m’ and ‘coopsVhr’ permit downloading of recent and historical data from more than 240 active water level stations in the continental U.S., Alaska and Hawaii using SOAP web services provided by the U.S. National Oceanographic and Atmospheric Administration (NOAA). WORLD TIDES can now perform storm tide analysis of the data and determine extratidal water levels using Highest Astronomical Tide (HAT) and Lowest Astronomical Tide (LAT), datums determined by the program.