automated weather observing system

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automated weather observing system (AWOS)

An automated weather reporting system, which transmits local real-time weather data directly to the pilot. AWOS-A transmits only the altimeter setting; AWOS-1 reports the altimeter setting, wind data, temperature, dew point, and density altitude. AWOS-2 reports are the same as AWOS-1 but also include visibility. AWOS-3 reports the same information as AWOS-2 along with cloud/ceiling data.
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