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June 12, 2024

A SODAR (sound detection and ranging) is an acoustic system used to remotely measure wind and turbulence characteristics in the lower atmosphere.  In operation, the antenna emits short sound pulses which are backscattered by temperature inhomogeneites in the air. The SODAR then evaluates amplitude and frequency changes in the backscattered sound waves, from which it calculates detailed information about the turbulence and wind structure of the lower atmosphere.  Height resolution is gathered by a process called range gating, which is the time it takes for the sound pulse to propagate from the antenna to the measured layer and back to the antenna.

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