radial wiki:
is a line drawn along a vector. A radial pattern is one that appears to radiate from a point, like the spokes from the hub of a wheel.In radio, evenly-spaced points along evenly-spaced radials on a map are used to determine average elevation above mean sea level (AMSL) within a radio station's coverage area (including broadcast stations and mobile phone towers, among others). This in turn determines height above average terrain (HAAT), which greatly affects a station's range (more so than power), and potential for interference with other stations.
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sun wiki:
>For other uses, see Sun (disambiguation). For the astrological significance of the Sun, see Solar system in astrology."Solar" redirects here; for the superhero by that name, see Solar (comics). The Sun is the star at the centre of our Solar system. Planet Earth orbits the Sun, as do many other bodies, including other planets, asteroids, meteoroids, comets and dust. Its heat and light support almost all life on Earth.
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