Definition
Each constituent has a fixed astronomical period and a port-specific amplitude and phase lag derived from long records of observation, ideally a year or more. Principal ones are M2 (principal lunar semi-diurnal, 12.42 h), S2 (principal solar semi-diurnal, 12.00 h), N2 (larger lunar elliptic), K1 and O1 (diurnal). Modern predictions sum tens to hundreds of constituents; shallow-water overtides such as M4 and M6 model distorted estuarine curves.
Want to apply this on the water?
Ask Saily out loud for an example, a scenario or a simpler explanation.
Talk to Saily