Harmonic Constant Data Format
# -- Order in which NOS lists the constituents.
Name -- Common name used to refer to a paticular constituent, subscript refers to the number of cycles per day.
Ampl -- One-half the range of a tidal constituent.
Epoch -- The phase lag of the observed tidal constituent relative to the theoretical equilibrium tide.
Speed -- The rate change in the phase of a constituent, expressed in degrees per hour. The speed is equal to 360 degrees divided by the constituent period expressed in hours.
Harmonic Constant Names
M2 - Principal lunar semidiurnal constituent
S2 - Principal solar semidiurnal constituent
N2 - Larger lunar elliptic semidiurnal constituent
K1 - Lunar diurnal constituent
M4 - Shallow water overtides of principal lunar constituent
O1 - Lunar diurnal constituent
M6 - Shallow water overtides of principal lunar constituent
MK3 - Shallow water terdiurnal
S4 - Shallow water overtides of principal solar constituent
MN4 - Shallow water quarter diurnal constituent
NU2 - Larger lunar evectional constituent
S6 - Shallow water overtides of principal solar constituent
MU2 - Variational constituent
2N2 - Lunar elliptical semidiurnal second-order constituent
OO1 - Lunar diurnal LAM2 - Smaller lunar evectional constituent
S1 - Solar diurnal constituent
M1 - Smaller lunar elliptic diurnal constituent
J1 - Smaller lunar elliptic diurnal constituent
MM - Lunar monthly constituent
SSA - Solar semiannual constituent
SA - Solar annual constituent
MSF - Lunisolar synodic fortnightly constituent
MF - Lunisolar fortnightly constituent
RHO - Larger lunar evectional diurnal constituent
Q1 - Larger lunar elliptic diurnal constituent
T2 - Larger solar elliptic constituent
R2 - Smaller solar elliptic constituent
2Q1 - Larger elliptic diurnal
P1 - Solar diurnal constituent
2SM2 - Shallow water semidiurnal constituent
M3 - Lunar terdiurnal constituent
L2 - Smaller lunar elliptic semidiurnal constituent
2MK3 - Shallow water terdiurnal constituent
K2 - Lunisolar semidiurnal constituent
M8 - Shallow water eighth diurnal constituent
MS4 - Shallow water quarter diurnal constituent