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Welcome to the Dauntless Aviation Glossary!
At Dauntless, our editorial staff maintains the web's largest unified glossary of aviation terms. This glossary is built from a combination of official, quasi-official,
and proprietary sources (including original material that we develop oursselves). Uniquely, we often provide multiple definitions of a given term so that you can find that which best applies
to you. In order to maximize your learning efficiency, this glossary (and similar ones for our international users) is incresingly fully integrated into our aviation learning apps, including
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ASOS
| ASOS | | | A weather observing system that provides minute-by minute weather observations, such as temperature, dew point, wind, altimeter setting, visibility, sky condition, and precipitation. Some ASOS stations include a precipitation discriminator that can differentiate between liquid and frozen precipitation. | | source: FAA Instrument Procedures Handbook (FAA-H-8083-16) |
| | | Weather reporting system which provides surface observations every minute via digitized voice broadcasts and printed reports. | | source: FAA Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25A) |
| | | Weather reporting system which provides surface observations every minute via digitized voice broadcasts and printed reports. | | source: FAA Risk Management Handbook (FAA-H-8083-2) |
| | | Automated Surface Observing System (ASOS): Weather reporting system which provides surface observations every minute via digitized voice broadcasts and printed reports. | | source: FAA Weight Shift Control Handbook (FAA-H-8083-5) |
| | | The Automated Surface Observation System, in the United States, is a surface weather observing system implemented by the National Weather Service, the Federal Aviation Administration and the Department of Defense. It is designed to support aviation operations and weather forecast activities. The ASOS provides continuous minute-by-minute observations and performs the basic observing functions necessary to generate an aviation routine weather report (METAR) and other aviation weather information. ASOS information may be transmitted over a discrete VHF radio frequency or the voice portion of a local navaid. A | | source: ICAO Aviation Chart Glossary |
| | | Automated Surface Observing System. A list of stations currently active and available through the NWS website can be found here. | | source: NOAA National Weather Service Glossary |
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Disclaimer: While this glossary in most cases is likely to be highly accurate and useful, sometimes, for any number of editorial, transcription, technical, and other reasons, it might not be.
Additionally, as somtimes you may have found yourself brought to this page through an automated term matching system, you may find definitions here that do not match the cotext or application in which
you saw the original term. Please use your good judgement when using this resource.
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