CORRECTIONS TO INERTIAL-RANGE POWER SPECTRA MEASURED BY CSAT3 AND SOLENT SONIC ANEMOMETERS,1. PATH-AVERAGING ERRORS

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Abstract

Sonic anemometer path-averaging errors are determined for measurements of inertial-range velocity and temperature power spectra as a function of k1p, where k1 is the streamwise wave number and p is the sonic path length. The attenuation of vertical velocity spectra is found to be quite similar for the CSAT3 and Solent anemometers and to be insensitive to wind direction. The attenuation of the horizontal wind component spectra is noticeably greater for the Solent sonics than for the CSAT3, but those for the CSAT3 have a greater dependence on wind direction. The attenuation of sonic temperature spectra is also found to be quite similar for the CSAT3 and Solent R3 sonics and to be insensitive to wind direction, while that of the Solent R2 is less than that of the other two sonics and has a minor dependence on wind direction.

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