# 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.
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References in periodicals archive ?
On the other hand, the azimuthally integrated magnitude of the radial flow is maximum for most central collisions and its values are high in the low [p.sub.T] region.
It is interesting to note that we mainly considered the evolution of the temperature profiles for axial and azimuthally multiple swirling jets in five separate configurations designated as A, B, C, D and E.
In this part, a numerical calculation is used to analyze the effects of the inner and outer radii on the dispersion curves of the azimuthally symmetric (l = 0) ES and TM modes and the interaction between them under different EM characteristics of the ion channel.
It can be noted that Figure 1 spatial poroperm heterogeneity leads to azimuthally erratic flow paths within the faults and within the embedding ambient crustal volume.
Xiqing, "Tight focusing of radially and azimuthally polarized vortex beams through a uniaxial birefringent crystal," Applied Optics, vol.
The result indicates that SWCNTs on the coffee ring are oriented along the coffee ring, namely, azimuthally aligned.
With a view to making the problem of guided electromagnetic wave propagation through such a model of slow-wave structure tractable, the azimuthally periodic dielectric constant of the tubular region between the tape helix and the outer conductor is replaced by its azimuthally-averaged constant value [[epsilon].sub.eff].
In addition, several high power microwave (HPM), generators such as the oscillators of virtual cathode (vircators), the relativists backward wave oscillators from reflected waves (BWOs) and the magnetically insulating transmission-line oscillators (MILOs) [1], generate azimuthally symmetric output modes with the TM01 circular waveguide mode, and even the coaxial line transverse electromagnetic mode TEM.
Figure 2 shows an example of the azimuthally binned spectra for NGC 7509.
Four azimuthally mounted reflectors of 250mm aperture were specially built for the project at the Paris Observatory.
Broadband characteristics, therefore, depend on solar elevation even in the case of stationary and azimuthally homogeneous atmosphere, causing the Forbes effect-virtual diurnal variation in atmospheric broadband optical characteristics (Ohvril et al., 1999).
Indicatricies are presented for reflection near [theta] = 40[degrees] with azimuthally angles [phi] = 0[degrees], 12.25[degrees], and 25.5[degrees].

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