# azimuth

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## azimuth

(ăz`əməth), in astronomy, one coordinate in the altazimuth coordinate systemaltazimuth coordinate system
or horizon coordinate system,
astronomical coordinate system in which the position of a body on the celestial sphere is described relative to an observer's celestial horizon and zenith.
. It is the angular distance of a body measured westward along the celestial horizon from the observer's south point.

## azimuth

(az -ă-mŭth) See horizontal coordinate system.

## Azimuth

(religion, spiritualism, and occult)

One can locate a specific celestial object in several ways, most of which involve specifying two coordinates. The azimuth is one of the coordinates of such a system. Although the notion of azimuth is basically simple, it is not simple to explain. Imagine that a group of people are looking at a star. From where they are standing, they can measure the angle between the horizon and the star. This gives them one coordinate in terms of angular distance (called the altitude, for obvious reasons). Then imagine a geometric plane that, like some kind of gigantic wall, cuts through Earth, intersecting the north and south poles, the place where they are standing, and the point directly over their heads (the zenith). They then measure another angle with their surveying instrument, this time between the imaginary wall and the star. This angular distance gives them the azimuth.

### Sources:

Filbey, John, and Peter Filbey. The Astrologer’s Companion. Wellingborough, Northamptonshire, UK: Aquarian Press, 1986.
Gettings, Fred. Dictionary of Astrology. London: Routledge & Kegan Paul, 1985.

## azimuth

[′az·ə·məth]
(astronomy)
Horizontal direction of a celestial point from a terrestrial point, expressed as the angular distance from a reference direction, usually measured from 0° at the reference direction clockwise through 360°.
(engineering)
In directional drilling, the direction of the face of the deviation tool with respect to magnetic north.
(geodesy)
Horizontal direction on the earth's surface.

## azimuth

azimuth
In plane surveying, a horizontal angle measured clockwise from north meridian to the direction of an object or fixed point.

## azimuth

i. A direction expressed as a horizontal angle, usually in degrees, measured clock-wise from a reference datum or direction, usually north. The azimuth will be a true zenith, grid azimuth, magnetic azimuth, or relative azimuth, depending upon which reference datum is used.
ii. The arc of the observer's rational horizon or the angle at his zenith contained between the observer's celestial meridian and the vertical circle through that body. It is the distance, measured in degrees, along the horizon westward from the south point of the horizon to the place where the vertical circle through an object intersects the horizon.
iii. As it pertains to aerial photography, the azimuth of a photograph is the clock-wise horizontal angle measured about the ground nadir point from the ground survey north meridian to the principal plane of the photograph. Also called azimuth of the principal plane.

## azimuth

Astronomy navigation the angular distance usually measured clockwise from the north point of the horizon to the intersection with the horizon of the vertical circle passing through a celestial body

## azimuth

The trajectory of an angle measured in degrees going clockwise from a base point. A disk azimuth alignment test checks for the correct positioning of the read/write head to the track.
References in periodicals archive ?
From the Maxwell system (1)--(3) a differential equation for the azimuthal component of the electric field strength [E.
2], and P were taken as the areas around the azimuthal angle of 30[degrees], 150[degrees], and 90[degrees], respectively, after the subtraction of baseline area.
This section is devoted to an extensive study of dimensionless temperature profiles depending on dimensionless azimuthal direction y/D variation for the different measuring stations.
Failure to understand azimuthal variations in physical or mechanical properties derived from seismic data can lead to poor well orientation, water breakthrough along natural or induced faults, incorrect prediction of the most fractured or fracturable zones, and ultimately sub-optimum production.
As examples of the general features of surfaces of spherical polar amplitude functions with further values of azimuthal quantum number l, we show in figure 15 the surface of [[psi].
28) Figure 4 shows the azimuthal dependence of the normalized events at elevation angles of 55 and 111mrad.
Third kind nonhomogeneous boundary conditions are applied in the radial direction but the first or second kind homogenous boundary conditions are used in the angular and azimuthal directions.
Then they share findings of tests at specific locations, among them the role of wrench faults and fractures in creating "sweet spots" in tight gas exploration and production in Rulison Field in Colorado, the fracture control of P-wave azimuthal anisotropy in a Laramide basement-cored anticline at Wyoming's Casper Arch, and natural fractures in folded sandstones of the Tensleep Formation in Wyoming.
For the transmitting antenna, the azimuthal angle, [phi], varied from 20[degrees] to 340[degrees] with steps of 40[degrees] and the polar angle, [theta], ranged from 30[degrees] to 150[degrees] with steps of 15[degrees].
In this case, WGMs of large azimuthal index should be excited in the resonators.

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