I have found a wealth of information using Harmonic Constituents to calculate tide levels. H(t) = Amplitude * cos ( t * harmonicSpeed + phase lag). Yet when I try to apply this to constituents from the NOAA the results never match the tables produced. I have since found that the NOAA constituents require an additional term, the Equilibrium value with the resulting constituent function looking more like
H(t) = Amplitude * cos ( t * harmonicSpeed + EquilibriumValue + phase lag).
I am looking for any hints on how this Equilibrium value is calculated or derived.
Addendum: The constituents are found here, this for San Diego, CaConstituents for San Diego. Sorry cannot find the source of the Equilibrium value but will when I get home from work.
