Azimuth | Wikipedia audio article
Channel: wikipedia tts
Date: 2019-10-04

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Azimuth


00:01:00 1 Navigation
00:02:54 1.1 True north-based azimuths
00:03:04 2 Cartographical azimuth
00:05:00 2.1 Calculating coordinates
00:05:33 3 Calculating azimuth
00:10:23 4 Mapping
00:10:53 5 Astronomy
00:11:43 6 Other systems
00:11:53 6.1 Right ascension
00:12:15 6.2 Horizontal coordinate
00:12:41 6.3 Polar coordinate
00:13:23 7 Other uses of the word
00:13:57 8 Etymology of the word
00:14:19 9 See also
00:14:54 10 Notes
00:15:03 11 References



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SUMMARY
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An azimuth ( (listen); from Arabic اَلسُّمُوت‎ as-sumūt, 'the directions', the plural form of the Arabic noun السَّمْت as-samt, meaning 'the direction') is an angular measurement in a spherical coordinate system. The vector from an observer (origin) to a point of interest is projected perpendicularly onto a reference plane; the angle between the projected vector and a reference vector on the reference plane is called the azimuth.
When used as a celestial coordinate, the azimuth is the horizontal direction of a star or other astronomical object in the sky. The star is the point of interest, the reference plane is the local area (e.g. a circular area 5 km in radius at sea level) around an observer on Earth's surface, and the reference vector points to true north. The azimuth is the angle between the north vector and the star's vector on the horizontal plane.Azimuth is usually measured in degrees (°). The concept is used in navigation, astronomy, engineering, mapping, mining, and ballistics.