Turbulence velocimetry technique

Details Turbulence velocimetry technique Turbulence velocimetry technique

1990-06-05

1991-07-16

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Echo systems

Speed determination

367 90, G01S 1500

Patent

active

050330306

ABSTRACT:
A technique for obtaining a class of beam patterns is described which results in eliminating the Doppler spread effect of the mean transverse component of flow of scatterers. This is accomplished by weighting various array elements. This component of flow is typically the main contributor to Doppler frequency spread. With this component eliminated, the other contributor of Doppler spread is due to the turbulent or fluctuating scatterer motion on the scale of the scattering volume. This contributor is smaller of the two and is estimated by standard Doppler methods.

REFERENCES:
Goodman, Doppler Statistics of Ocean Velocity Variability, Jun. 6, 1989, 43-53.
Hermitte et al., "Multibeam Doppler Sonar Observation of Tidal Flow Turbulence", Geophys. Letters, 1983, pp. 717-720.

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