above ground level


above ground level
The height of an aircraft above ground level. Also known as absolute altitude. It is measured by a radio, radar, or laser altimeter. When an aircraft is required to fly at a certain height above ground level, the AGL refers to its average height above terrain, not above certain high features and obstacles that may be in the area of operation. If the aircraft is to fly at a fixed height above all obstacles and features, then the height is above obstruction level (AOL), not above ground level. The former may be greater than or equal to the AGL. See above obstruction level.

Aviation dictionary. 2014.

Look at other dictionaries:

  • Above ground level — In aviation and atmospheric sciences, an altitude is said to be above ground level (AGL) when it is measured with respect to the underlying ground surface. This is as opposed to above mean sea level (AMSL), or in broadcast engineering, height… …   Wikipedia

  • Above ground level — Este artículo o sección necesita referencias que aparezcan en una publicación acreditada, como revistas especializadas, monografías, prensa diaria o páginas de Internet fidedignas. Puedes añadirlas así o avisar …   Wikipedia Español

  • Above ground level — AGL ist die englische Abkürzung für above ground level. In der Luftfahrt werden Höhenangaben mit dem Zusatz AGL versehen, wenn es sich um eine Höhe über Grund handelt. Im Gegensatz dazu beziehen sich Höhenangaben mit dem Zusatz MSL auf den… …   Deutsch Wikipedia

  • Above Ground Level — AGL, altitude above the surface of the Earth, height above the ground …   English contemporary dictionary

  • above obstruction level — The height of an aircraft above terrain, structures, and obstacles in the area of operation. The height is nominated for aircraft carrying out very low flying. Pilots either take into consideration heights indicated on maps and charts when… …   Aviation dictionary

  • above-ground pool — /əˌbʌv graʊnd ˈpul/ (say uh.buv grownd poohl) noun a domestic swimming pool which sits above ground level (opposed to below ground pool, in ground pool) …   Australian English dictionary

  • ground level — ground .level n [singular] the same level as the surface of the earth, rather than above it or below it ▪ The flats are set around a courtyard with shops at ground level …   Dictionary of contemporary English

  • ground level — noun (singular) the same level as the surface of the earth, rather than above it or below it …   Longman dictionary of contemporary English

  • Above mean sea level — The term above mean sea level (AMSL) refers to the elevation (on the ground) or altitude (in the air) of any object, relative to the average sea level datum. AMSL is used extensively in radio (both in broadcasting and other telecommunications… …   Wikipedia

  • ground — {{Roman}}I.{{/Roman}} noun 1 solid surface of the earth ADJECTIVE ▪ firm, hard, solid ▪ muddy, soft ▪ damp, wet …   Collocations dictionary


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