apparent altitude

См. также в других словарях:

• Altitude — Al ti*tude, n. [L. altitudo, fr. altus high. Cf. {Altar}, {Haughty}, {Enhance}.] 1. Space extended upward; height; the perpendicular elevation of an object above its foundation, above the ground, or above a given level, or of one object above… …   The Collaborative International Dictionary of English

• Apparent horizon — Horizon Ho*ri zon, n. [F., fr. L. horizon, fr. Gr. ? (sc. ?) the bounding line, horizon, fr. ? to bound, fr. ? boundary, limit.] 1. The line which bounds that part of the earth s surface visible to a spectator from a given point; the apparent… …   The Collaborative International Dictionary of English

• altitude — noun the height of an object or point in relation to sea level or ground level. ↘Astronomy the apparent height of a celestial object above the horizon, measured in angular distance. ↘Geometry the length of the perpendicular line from a vertex to… …   English new terms dictionary

• pressure altitude — noun : the altitude corresponding to a given pressure in a standard atmosphere * * * Meteorol. the altitude for a given pressure in a standard atmosphere, such as that registered by a pressure altimeter. * * * pressure altitude noun (aeronautics) …   Useful english dictionary

• Meridian altitude — Altitude Al ti*tude, n. [L. altitudo, fr. altus high. Cf. {Altar}, {Haughty}, {Enhance}.] 1. Space extended upward; height; the perpendicular elevation of an object above its foundation, above the ground, or above a given level, or of one object… …   The Collaborative International Dictionary of English

• Poids apparent — Le poids apparent d un objet correspond au poids indiqué par un peson (ou tout autre instrument approprié à la mesure d une force), quand ce poids n est pas identique au poids « réel » de l objet, défini soit comme la force purement… …   Wikipédia en Français

• High altitude nuclear explosion — High altitude nuclear explosions have historically been nuclear explosions which take place above altitudes of 50 km, still inside the Earth s atmosphere. Such explosions have been tests of nuclear weapons, used to determine the effects of the… …   Wikipedia

• ha — • apparent altitude …   Maritime acronyms and abbreviations

• Westland Welkin — infobox Aircraft name = Westland Welkin type = high altitude fighter manufacturer = Westland Aircraft caption = Welkin Mk I DX282 designer = W.E.W. Petter first flight = 1 November 1942 introduced = May 1944 retired = November 1944 status =… …   Wikipedia

• Angle of refraction — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English

• Conical refraction — Refraction Re*frac tion (r?*fr?k sh?n), n. [F. r[ e]fraction.] 1. The act of refracting, or the state of being refracted. [1913 Webster] 2. The change in the direction of ray of light, heat, or the like, when it enters obliquely a medium of a… …   The Collaborative International Dictionary of English