# 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.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

## 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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## azimuth

azimuth
In plane surveying, a horizontal angle measured clockwise from north meridian to the direction of an object or fixed point.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

## 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
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## 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.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
By increasing the Re number, the circulation approaches its inlet value (i.e., [[bar.[GAMMA]].sub.in]) and the azimuthal velocity approaches the limit [[bar.[GAMMA]].sub.in]/r in the whole solution domain, except in the region very close to the symmetry axis.
This paper proposes a compact dual-polarized MIMO antenna for WLAN 2.4-GHz with omnidirectional radiation pattern in the azimuthal plane.
In Section 3, after short description of the experimental procedure used to measure the azimuthal easy axis angle as a function of irradiation time, the theoretical curves computed from the model are compared with the experimental data measured at various values of the polarization azimuth.
Besides the equatorial tracking systems (such as that approached in the paper), the strategy can be applied/adapted for any other type of tracking mechanism (pseudo-equatorial, azimuthal, or pseudo-azimuthal).
The azimuthal component of XASW electric field is expressed through the magnetic one.
AnalyzeDisp.GetDint(self) Retrieve the dispersion of a resonator based on the frequency of resonance and azimuthal mode order.
The pressure gradient in the azimuthal direction is caused by the variation in the interface radius of curvature, which gives rise to the surface tension induced flow governed by the Young-laplace equation.
The swirl number is introduced by controlling the axial and azimuthal velocity components at the inlet.
Hepburn, "Waggle dances and azimuthal windows," Psyche, vol.
By acquiring images at several azimuthal angles ([mu]), it is possible to reconstruct the inplane reciprocal space map as presented in Figures 10(b) and 10(c).
[I.sub.[theta]] and [I.sub.r] are the currents flowing in the azimuthal and radial directions, respectively.
(ii) angular dependencies between relative azimuthal angles of recorded [gamma] interaction points, specific to topology of the event [60].

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