Theory of tides Long period Long period

| Higher_harmonics | Darwin | Period | Speed | Doodson_coefficients | NOAA |
|---|---|---|---|---|---|
| Shallow water eighth diurnal | M 8 | 3.105150301 | 115.9364166 | 8 | 36 |
| Shallow water quarter diurnal | MS 4 | 6.103339275 | 58.9841042 | 4 | 37 |
| Semi-diurnal | Darwin | Period | Speed | Doodson coefficients | NOAA |
| Species | Symbol | (hr) | (°/hr) | n 1 (L) | order |
| Principal lunar semidiurnal | M 2 | 12.4206012 | 28.9841042 | 2 | 1 |
| Principal solar semidiurnal | S 2 | 12 | 30 | 2 | 2 |
| Larger lunar elliptic semidiurnal | N 2 | 12.65834751 | 28.4397295 | 2 | 3 |
| Larger lunar evectional | ν 2 | 12.62600509 | 28.5125831 | 2 | 11 |
| Variational | MU 2 | 12.8717576 | 27.9682084 | 2 | 13 |
| Lunar elliptical semidiurnal second-order | 2N 2 | 12.90537297 | 27.8953548 | 2 | 14 |
| Smaller lunar evectional | λ 2 | 12.22177348 | 29.4556253 | 2 | 16 |
| Larger solar elliptic | T 2 | 12.01644934 | 29.9589333 | 2 | 27 |