| 单词 | true azimuth |
| 释义 | > as lemmastrue azimuth a. The angular distance of any such circle from a given limit, e.g. a meridian. Hence, the true azimuth of a heavenly body is, the arc of the horizon intercepted between the north (or, in the Southern hemisphere, south) point of the horizon and the point where the great circle passing through the observed heavenly body cuts the horizon. Its magnetic azimuth is the arc intercepted between the magnetic meridian and this great circle. azimuth compass: a minutely divided mariner's compass, fitted with vertical sights, used for taking the magnetic azimuth of a heavenly body. azimuth dial: one whose gnomon is perpendicular to the plane of the horizon. azimuth mirror: an instrument placed on the glass cover of a mariner's compass and used for taking azimuths. ΘΚΠ the world > the universe > heavenly body > position of heavenly body > [noun] > other declinationc1400 meridian altitudec1400 angle of position?a1560 zenith distance1588 refraction1603 azimuth1626 amplitude1627 horizontal parallax1665 complement1703 aberration1737 hour-angle1837 intercept1901 1626 J. Smith Accidence Young Sea-men 36 Learne to obserue..the Sunnes Azimuth and Almicanter. 1697 W. Dampier New Voy. around World xix. 531 The Azimuth Compass, an Instrument more peculiar to the Seamen of our Nations. 1762 W. Falconer Shipwreck i. 10 The Pilots now an Azimuth attend. 1834 Nat. Philos. (Libr. Useful Knowl.) III. Astron. 255/1 The true azimuth, compared with the magnetic azimuth, will give the deviation of the compass. < as lemmas |
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