What is sonic anemometer and on what pricipal is it work ?

Basically i need some information about the reason of using three treansducer in sonic anemometer ?

Answer:
The principle uses sonic technology in orthogonal directions, as inputs to detect speeds.

I suspect the reason for the 3 transducers is to sense the output of speeds, on three planes.

Here's a link to the specification sheet:

http://www.apptech.com/brochures/sonics.

Hope it helps.

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What is sonic anemometer and on what pricipal is it work ?

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