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arc minute |
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arc minuteUnit for measuring small angles, used in geometry, surveying, map-making, and astronomy. An arc minute is one-sixtieth of a degree and is divided into 60 arc seconds (symbol "). Small distances in the sky, as between two close stars or the apparent width of a planet's disc, are expressed in minutes and seconds of arc. |
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| Total lost motion including backlash, spring rate and hysteresis tops out at only one arc minute. By constantly monitoring speed and position, the PosiTrack 20 can move pan, tilt, and lens in sync -- and arrive at a shot preset with a +/- 3 arc minute accuracy. |
arc minute
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