Velocity decontamination by cospectral methods: Difference between revisions
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Short page on cospectral techniques for wave pumped surface buoys, and standard coherence (similar to shear probe techniques) when the contamination is vibration related. | |||
* Basically, if you need to decontaminate the spectra for motion using any cospectral technique.. you must ensure a fairly large degrees of freedom so that the calculation is meaningful. | * Basically, if you need to decontaminate the spectra for motion using any cospectral technique.. you must ensure a fairly large degrees of freedom so that the calculation is meaningful. | ||
Latest revision as of 15:24, 11 July 2022
Short page on cospectral techniques for wave pumped surface buoys, and standard coherence (similar to shear probe techniques) when the contamination is vibration related.
- Basically, if you need to decontaminate the spectra for motion using any cospectral technique.. you must ensure a fairly large degrees of freedom so that the calculation is meaningful.
- As a rule of thumb, I like to target over 50 dof, which is achievable when using
** 7 blocks i.e., diss-length that is 4x fft-length and band-averaging over 3 frequencies to retain samples over the lower frequencies (and increase number of spectral obs over the inertial subrange) ** 9 blocks i.e., diss-length that is 5x fft-length (no band-averaging)
