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Radar
? TBD
Object detection system using radio waves
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Wikipedia

Radar is a system that uses radio waves to determine the distance (ranging), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations and terrain. The term RADAR was...

Subclass of
Measuring instrument
References
Wikidata