User:Karlhahn/Tide Prediction

Objective: Plan to explain the method of harmonic constituents as detailed in U.S. Govt. Special Publication 98

Redirects will include Tidal Prediction | Tidal Constituent | Tidal Constituents | Harmonic Constituent | Harmonic Constitutents | Predicting the Tides | Prediction of Tides

Links to harmonic constituent data

• Xtide Downloads
• U.S. NOAA Tides and Currents Database
• U.K Tidal and Sea Level Facility
• University of New Hampshire database

Image repository

Figure 1

Figure 2

Figure 3

Figure 4

Symbols

☊ ☋ ♈ ☽ ☾   Note: These do not render under IE 6

Using {{Unicode|symbol}}: ☊ ☋ ♈ ☽ ☾

Symbol Index
♈	First point in Aries. The point in the heavens where the sun crosses the equator going from south to north.
♈'	Projection of the first point of Aries onto the lunar orbit.
☊	Ascending lunar node. The point in the heavens where the moon crosses the ecliptic going from south to north.
A	Lunar intersection. The point in the heavens where the moon crosses the equator going from south to north.
ω	Inclination of the equator with respect to the ecliptic; approximately 23½°.
i	Inclination of the moon's orbit with respect to the ecliptic; approximately 5°
I	Inclination of the moon's orbit with repect to the equator; varies with time between 18½° and 28½°.
ξ	Longitude (in the moon's orbit) of the lunar intersection. The arc between ♈' and A.
ν	Longitude (in the ecliptic) of the lunar intersection. The arc between ♈ and A.
P	Local zenith. The point in the heavens directly over the observer's head.
P'	The point in the heavens at which the observer's local meridian crosses the equator.
S	Location in the heavens of the mean sun.
S'	The point in the heavens at which the meridian of the mean sun intersects the equator.
T	Hour angle of the mean sun.
X	Hour angle of the lunar intersection, A
M	Location in the heavens of the mean moon.
M'	The point in the heavens at which the meridian of the mean moon intersects the equator.
t	Hour angle of the mean moon.