nadir point

nadir point
i. The same as nadir
ii. As it relates to aerial photogrammetry, it is the point where a plumb line dropped from the front nodal point pierces the photograph. This point is vertically beneath the exposure station. In the illustration, it is point N. Also called a photo nadir and a photo plumb point.

Aviation dictionary. 2014.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • nadir — [ nadir ] n. m. • 1556; nador 1361; ar. nâdir « opposé (au zénith) » ♦ Astron. Point de la sphère céleste diamétralement opposé au zénith, et qui se trouve sur la verticale de l observateur. ● nadir nom masculin (arabe naẓīr, opposé au zénith)… …   Encyclopédie Universelle

  • nadir — That point on the celestial sphere directly beneath the observer and directly opposite the zenith (i.e., 180° from the zenith, so that the zenith, nadir, and the center of the earth are in one straight line). Also called a nadir point …   Aviation dictionary

  • point — I. Point. s. m. Picqueure qui se fait dans de l estoffe avec une aiguille enfilée de soye, de laine, de fil, &c. Il n y a qu un point ou deux à faire pour recoudre cela. faire un point d aiguille. En parlant d ouvrages de tapisserie à l aiguille …   Dictionnaire de l'Académie française

  • Nadir — Na dir (n[=a] d[ e]r), n. [F., Sp., & It. nadir; all fr. Ar. naz[=i]ru s samt nadir, prop., the point opposite the zenith (as samt), in which naz[=i]r means alike, corresponding to. Cf. {Azimuth}, {Zenith}.] 1. That point of the heavens, or lower …   The Collaborative International Dictionary of English

  • Nadir of the sun — Nadir Na dir (n[=a] d[ e]r), n. [F., Sp., & It. nadir; all fr. Ar. naz[=i]ru s samt nadir, prop., the point opposite the zenith (as samt), in which naz[=i]r means alike, corresponding to. Cf. {Azimuth}, {Zenith}.] 1. That point of the heavens, or …   The Collaborative International Dictionary of English

  • point — 1. (poin ; le t se lie : un poin t important ; au pluriel, l s se lie : des points z importants) s. m. 1°   Douleur qui point, qui pique. 2°   Piqûre que l on fait dans l étoffe avec une aiguille enfilée d un fil. 3°   Nom donné à certains… …   Dictionnaire de la Langue Française d'Émile Littré

  • nadir — (n.) late 14c., in astronomical sense, from M.L. nadir, from Arabic nazir opposite to, in nazir as samt, lit. opposite of the zenith, from nazir opposite + as samt zenith (see ZENITH (Cf. zenith)). Transferred sense of lowest point (of anything)… …   Etymology dictionary

  • nadir — [n] lowest point all time low, base, bottom, floor, low point, record low, rock bottom, zero level; concept 442 …   New thesaurus

  • nadir — NADIR. s. m. Terme d Astronomie pris des Arabes, Le point du ciel qui est directement opposé au Zenith, ou point vertical …   Dictionnaire de l'Académie française

  • nadir — ► NOUN 1) Astronomy the point on the celestial sphere directly opposite the zenith and below an observer. 2) the lowest or most unsuccessful point. ORIGIN from Arabic, opposite to the zenith …   English terms dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”