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Layer represents the geographic locations of stations at which tide
predictions can be generated from historic and active water level stations. Tide
predictions are a calculation of what the water level will be based on the analysis of data collected at these locations. Harmonic stations generate predictions from harmonic constituents from the data analysis; Subordinate stations generate predictions using time and height adjustments applied to the predictions for a specific harmonic station. CO-OPS offers six-minute and hourly tide/water level predictions "on-the-fly" for all stations with harmonic constituents. CO-OPS also offers high/low data for all stations in NOAA's published tide and current table. The CO-OPS site is updated every quarter; during the first two weeks of January, April, July and October. The quarterly updates may include the addition of new stations, updating subordinate and harmonic stations, and removal of superseded stations. More information can be found at
http://tidesandcurrents.noaa.gov/tide_predictions.htmlremoval of superseded stations. More information can be found @ http://tidesandcurrents.noaa.gov/tide_predictions.html |