Sonic anemometer: Difference between revisions

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|Meaning=An [[anemometer]] that measures [[linear]] components of the [[wind vector]] by  determining the effect of the [[wind]] on transit times of acoustic pulses transmitted in opposite  directions across known paths.
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|Explanation=It operates on the principle that the propagation [[velocity]] of a [[sound wave]] in a moving medium  is equal to the [[velocity of sound]] with respect to the medium plus the velocity of the medium.  The wind velocity [[vector]] is determined by measuring the [[wind speed]] along three independent  linear paths, for example, three [[orthogonal]] paths. The sonic anemometer is an [[absolute instrument]]  and has the advantages of a very short [[time constant]] and an absence of moving mechanical  parts.
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== sonic anemometer ==
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<div class="definition"><div class="short_definition">An [[anemometer]] that measures [[linear]] components of the [[wind vector]] by  determining the effect of the [[wind]] on transit times of acoustic pulses transmitted in opposite  directions across known paths.</div><br/> <div class="paragraph">It operates on the principle that the propagation [[velocity]] of a [[sound wave]] in a moving medium  is equal to the [[velocity of sound]] with respect to the medium plus the velocity of the medium.  The wind velocity [[vector]] is determined by measuring the [[wind speed]] along three independent  linear paths, for example, three [[orthogonal]] paths. The sonic anemometer is an [[absolute instrument]]  and has the advantages of a very short [[time constant]] and an absence of moving mechanical  parts.</div><br/> </div>
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Latest revision as of 06:25, 30 March 2024

An anemometer that measures linear components of the wind vector by determining the effect of the wind on transit times of acoustic pulses transmitted in opposite directions across known paths.

It operates on the principle that the propagation velocity of a sound wave in a moving medium is equal to the velocity of sound with respect to the medium plus the velocity of the medium. The wind velocity vector is determined by measuring the wind speed along three independent linear paths, for example, three orthogonal paths. The sonic anemometer is an absolute instrument and has the advantages of a very short time constant and an absence of moving mechanical parts.

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