33 relations: Aircraft warning lights, Aircraft warning paint, Altimeter, Altimeter setting, Altitude, Antenna (radio), Atmosphere, Atmospheric pressure, Atmospheric sciences, Aviation, Aviation accidents and incidents, Barometer, Broadcast engineering, Broadcast range, Broadcasting, Climate, Continent, Controlled flight into terrain, Earth, General circulation model, Height above average terrain, Instrument flight rules, International Civil Aviation Organization, Landing gear, Lowest safe altitude, Metres above sea level, Radio frequency, Radio masts and towers, Sigma coordinate system, Topography, Very high frequency, Visibility, Weather.
Aircraft warning lights
Aircraft warning lights are high-intensity lighting devices that are attached to tall structures and are used as collision avoidance measures.
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Aircraft warning paint
Aircraft warning paint is a system of red/orange and white paint scheme that allows for aircraft to avoid colliding with tall objects like radio masts and other tall objects (during daylight hours) that may pose a collision threat to aircraft.
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Altimeter
An altimeter or an altitude meter is an instrument used to measure the altitude of an object above a fixed level.
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Altimeter setting
Altimeter setting is the value of the atmospheric pressure used to adjust the sub-scale of a pressure altimeter so that it indicates the height of an aircraft above a known reference surface.
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Altitude
Altitude or height (sometimes known as depth) is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, atmospheric pressure, and many more).
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Antenna (radio)
In radio, an antenna is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver.
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Atmosphere
An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body, that is held in place by the gravity of that body.
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Atmospheric pressure
Atmospheric pressure, sometimes also called barometric pressure, is the pressure within the atmosphere of Earth (or that of another planet).
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Atmospheric sciences
Atmospheric science is the study of the Earth's atmosphere, its processes, the effects other systems have on the atmosphere, and the effects of the atmosphere on these other systems.
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Aviation
Aviation, or air transport, refers to the activities surrounding mechanical flight and the aircraft industry.
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Aviation accidents and incidents
An aviation accident is defined by the Convention on International Civil Aviation Annex 13 as an occurrence associated with the operation of an aircraft, which takes place between the time any person boards the aircraft with the intention of flight until all such persons have disembarked, where a person is fatally or seriously injured, the aircraft sustains damage or structural failure or the aircraft is missing or is completely inaccessible.
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Barometer
A barometer is a scientific instrument used in meteorology to measure atmospheric pressure.
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Broadcast engineering
Broadcast engineering is the field of electrical engineering, and now to some extent computer engineering and information technology, which deals with radio and television broadcasting.
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Broadcast range
A broadcast range (also listening range or listening area for radio, or viewing range or viewing area for television) is the service area that a broadcast station or other transmission covers via radio waves (or possibly infrared light, which is closely related).
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Broadcasting
Broadcasting is the distribution of audio or video content to a dispersed audience via any electronic mass communications medium, but typically one using the electromagnetic spectrum (radio waves), in a one-to-many model.
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Climate
Climate is the statistics of weather over long periods of time.
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Continent
A continent is one of several very large landmasses of the world.
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Controlled flight into terrain
A controlled flight into terrain (CFIT, usually pronounced cee-fit) is an accident in which an airworthy aircraft, under pilot control, is unintentionally flown into the ground, a mountain, a body of water or an obstacle.
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Earth
Earth is the third planet from the Sun and the only astronomical object known to harbor life.
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General circulation model
A general circulation model (GCM) is a type of climate model.
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Height above average terrain
Height above average terrain (HAAT) (or less popularly, EHAAT, Effective Height Above Average Terrain) is a measure of how high an antenna site is above the surrounding landscape.
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Instrument flight rules
Instrument flight rules (IFR) is one of two sets of regulations governing all aspects of civil aviation aircraft operations; the other is visual flight rules (VFR).
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International Civil Aviation Organization
The International Civil Aviation Organization (ICAO Organisation de l'aviation civile internationale, OACI), is a specialized agency of the United Nations.
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Landing gear
Landing gear is the undercarriage of an aircraft or spacecraft and may be used for either takeoff or landing.
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Lowest safe altitude
In aviation (particularly in air navigation), lowest safe altitude (LSALT) is an altitude that is at least 500 feet above any obstacle or terrain within a defined safety buffer region around a particular route that a pilot might fly.
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Metres above sea level
Metres above mean sea level (MAMSL) or simply metres above sea level (MASL or m a.s.l.) is a standard metric measurement in metres of the elevation or altitude of a location in reference to a historic mean sea level.
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Radio frequency
Radio frequency (RF) refers to oscillatory change in voltage or current in a circuit, waveguide or transmission line in the range extending from around twenty thousand times per second to around three hundred billion times per second, roughly between the upper limit of audio and the lower limit of infrared.
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Radio masts and towers
Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials) for telecommunications and broadcasting, including television.
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Sigma coordinate system
The sigma coordinate system is a common coordinate system used in computational models for oceanography, meteorology and other fields where fluid dynamics are relevant.
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Topography
Topography is the study of the shape and features of the surface of the Earth and other observable astronomical objects including planets, moons, and asteroids.
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Very high frequency
Very high frequency (VHF) is the ITU designation for the range of radio frequency electromagnetic waves (radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten to one meter.
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Visibility
In meteorology, visibility is a measure of the distance at which an object or light can be clearly discerned.
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Weather
Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy.
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Redirects here:
Above Ground Level, Above ground level, Altitude above ground level, Metres above ground level.
References
[1] https://en.wikipedia.org/wiki/Height_above_ground_level