declination
See Also: celestial sphere, magnetic declination
[coordinate systems] In a spherical coordinate system, the angle between the equatorial plane and a line to a point somewhere on the sphere.
The declination of the Sun (δ) is the angle between the rays of the sun and the plane of the earth's equator.
Magnetic Declination . . .
Another feature found in the legend of topographic maps is the magnetic declination.
Declination East - Magnetic least (i.e. magnetic less than grid)
Declination West - Magnetic best ...
declination
in a system of polar or spherical coordinates, the angle at the origin between a line to a point and the equatorial plane, measured in a plane perpendicular to the equatorial plane; ...
Declination
The degree of variation between true north and magnetic north that varies with location and changes over time as the position of the magnetic north pole migrates.
Degrees ...
d. Declination statement filed by employee:
RETENTION: 6 years after separation from service
10.[208]
Unemployment insurance records ...
Declination Location (latitude) on the Earth where the Sun on a particular day is directly overhead (90° from horizon) at solar noon. This location is somewhere between 23.5° North and 23.5° South depending on the time of the year.
Magnetic Declination: the angle between magnetic north and true north at any point. Sometimes the term Magnetic Variation is used and this is mainly on Nautical and Aeronautical Charts.
Magnetic declination has been measured in many countries, including the U.S. The line of zero declination in the U.S. runs from the North Magnetic Pole through Lake Superior and across the western panhandle of Florida.
magnetic declination See: declination map Graphic representation of the physical features (natural, artificial, or both) of a part or the whole of the Earth's surface, by means of signs and symbols or photographic imagery, ...
magnetic declination Angle of divergence between true north and magnetic north. Measured in degrees east or west of true, or geographic north.
magnetic equator Lies half way between the north and south magnetic poles.
Setting the solar declination declin by user is an option to override the value computed by the internal routine for the day of the year.
Based on spherical trigonometry, the SZA is a function of the latitude of the location, the solar declination, and the time of day.
The angle between true North and magnetic north, or between the geographic and magnetic meridians, is called the magnetic declination.
The analemma is a figure-8-shaped diagram that shows the declination of the sun (the angle that the sun is from the equator), for each day in the year.
It shows the deviation from a standard direction, called a bearing or course (for our purposes, magnetic declination is irrelevant).
Problem: suppose one leaves home by plane, keeping a constant course bearing. Which localities will be visited?
Magnetic Declination:
The horizontal angular difference between True North and Magnetic North.
Magnetic Inclination:
The vertical angular difference between a horizontal plane and the orientation of Earth's magnetic field.
Delambre in his Histoire de l'Astronomie Ancienne (1817) concluded that Hipparchus knew and used a real (celestial) equatorial coordinate system, directly with the right ascension and declination (or with its complement, polar distance).
Applies particularly to text or symbols, two point line features, and entire blocks of spatial features. For example, a water hydrant with an orientation of 30 degrees would be viewed with a declination of 120 degrees from the horizontal plane.
 See also: Map, Geographic, Location, Area, Surface
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