Minimizing flow distortion errors in a sonic anemometer

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This paper describes a simple approach to minimizing probe-induced flow distortion errors in a three-axis sonic anemometer. By separating the three axes, mutual interference between the transducers and supports in the three arrays is reduced. Only a transducer shadow correction determined from wind tunnel tests is needed to obtain measurements that are virtually insensitive to probe orientation relative to the mean flow. Preliminary results from a series of three atmospheric tests verify the effectiveness of this correction.

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