Abstract
This paper describes the influence of noise on the u, v, and w wind components, which are measured by commonly used rectangular hot-film or hot-wire probes. It is shown that the distortion of the u, v, and w turbulence spectra may be entirely different, even if all three measured cooling velocities are equally disturbed by the same noise signal. A practical formalism is given for estimating the influence of any cooling velocity noise on the spectra and cospectra of u, v, and w. With inverted matrices, the original spectrum of a noise signal in the cooling velocities can be calculated from the observed u, v, and w spectra, assuming that the undisturbed shape of them is known.
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References
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This work was supported by the Sonderforschungsbereich Meeresforschung of the Deutsche Forschungsgemeinschaft.
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Zank, I. On the influence of noise on measurements with three-dimensional hot-film or hot-wire probes. Boundary-Layer Meteorol 19, 487–493 (1980). https://doi.org/10.1007/BF00122348
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DOI: https://doi.org/10.1007/BF00122348