flattening

flattening
The ratio of the difference between the equatorial radius (major semi-axis) and the polar radius (minor semi-axis) of the earth to the equatorial radius. Also called compression. The flattening of the earth is the ellipticity of the spheroid, and it equals the ellipticity of the ellipse forming a meridianal section of the spheroid. If a and b represent the major and minor semi-axes of the spheroid, respectively, and f is the flattening of the earth, f = (a − b)/a. The magnitude of the flattening is sometimes expressed by stating the numerical value of the reciprocal of the flattening, a/(a − b).

Aviation dictionary. 2014.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Flattening — Flattening. См. Правка. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • Flattening — Ellipticity redirects here. For ellipticity in differential calculus, see elliptic operator. This article is about geometry. For psychopathology, see flattening of affect. The flattening, ellipticity, or oblateness of an oblate spheroid is a… …   Wikipedia

  • Flattening — Flatten Flat ten (fl[a^]t t n), v. t. [imp. & p. p. {Flattened}; p. pr. & vb. n. {Flattening}.] [From {Flat}, a.] 1. To reduce to an even surface or one approaching evenness; to make flat; to level; to make plane. [1913 Webster] 2. To throw down; …   The Collaborative International Dictionary of English

  • Flattening dies — Flattening dies. См. Правильные штампы. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • Flattening test — Flattening test. См. Правильное испытание. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • Flattening oven — Flatten Flat ten (fl[a^]t t n), v. t. [imp. & p. p. {Flattened}; p. pr. & vb. n. {Flattening}.] [From {Flat}, a.] 1. To reduce to an even surface or one approaching evenness; to make flat; to level; to make plane. [1913 Webster] 2. To throw down; …   The Collaborative International Dictionary of English

  • flattening out — UK US flatten off/out Phrasal Verb with flatten({{}}/ˈflætən/ verb [I or T] ► to stop rising or falling, and stay at the same level: »If the housing market continues to flatten out or even decline, we re in for some tough times.… …   Financial and business terms

  • flattening oven — noun Etymology: flattening from gerund of flatten : a heating chamber in which split glass cylinders are flattened and annealed …   Useful english dictionary

  • flattening stone — noun : a stone used in a flattening oven …   Useful english dictionary

  • flattening — noun a) The act, or the result of making something flat of flatter The Earth is a sphere that has flattenings at the poles. b) A flattened part of something …   Wiktionary

Share the article and excerpts

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