Vibration-coherent noise removal: Difference between revisions
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All platforms vibrate. The shear probe, like nearly all other velocity sensors, measures the velocity of the fluid relative to the platform that holds the probe. Thus, platform vibrations induce a signal that is due to platform motions and does not represent environmental shear. The algorithm described by Goodman et al (2006)<ref> Goodman, L., Levine, E. R., & Lueck, R. G. (2006). On measuring the terms of the turbulent kinetic energy budget from an AUV. Journal of Atmospheric and Oceanic Technology, 23(7), 977-990. </ref> is often used to remove vibration-induced components from shear-probe spectra. However, this removal biases the spectrum low, in a wavenumber-independent manner, and must be corrected <ref> Lueck, R. G., 2021c: The bias in coherent-noise removal. Journal of Atmospheric and Oceanic Technology –, submitted, doi:--.</ref>. | All platforms vibrate. The shear probe, like nearly all other velocity sensors, measures the velocity of the fluid relative to the platform that holds the probe. Thus, platform vibrations induce a signal that is due to platform motions and does not represent environmental shear. The algorithm described by Goodman et al (2006)<ref> Goodman, L., Levine, E. R., & Lueck, R. G. (2006). On measuring the terms of the turbulent kinetic energy budget from an AUV. Journal of Atmospheric and Oceanic Technology, 23(7), 977-990. </ref> is often used to remove vibration-induced components from shear-probe spectra. However, this removal biases the spectrum low, in a wavenumber-independent manner, and must be corrected <ref> Lueck, R. G., 2021c: The bias in coherent-noise removal. Journal of Atmospheric and Oceanic Technology –, submitted, doi:--.</ref>. | ||
==References== | ==References== | ||
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Revision as of 15:41, 9 November 2021
All platforms vibrate. The shear probe, like nearly all other velocity sensors, measures the velocity of the fluid relative to the platform that holds the probe. Thus, platform vibrations induce a signal that is due to platform motions and does not represent environmental shear. The algorithm described by Goodman et al (2006)[1] is often used to remove vibration-induced components from shear-probe spectra. However, this removal biases the spectrum low, in a wavenumber-independent manner, and must be corrected [2].
References
- ↑ Goodman, L., Levine, E. R., & Lueck, R. G. (2006). On measuring the terms of the turbulent kinetic energy budget from an AUV. Journal of Atmospheric and Oceanic Technology, 23(7), 977-990.
- ↑ Lueck, R. G., 2021c: The bias in coherent-noise removal. Journal of Atmospheric and Oceanic Technology –, submitted, doi:--.
return to Flow chart for shear probes
