Turbulent Point Water Velocity is the measurement of water velocity (speed and direction) within a 1cm3 box that can be used to derive turbulence data. Water velocity is estimated using a sound pulse emitted from the central transducer and measuring its Doppler Shift as it is received back by three acoustic receivers surrounding the central transducer. The theory behind this measurement is that the sound pulse is reflected back to the instrument by reflecting off of particles in the water column. As the particles within the water column are assumed to move at the same velocity of the water, by measuring the velocity of the particle (via Doppler shift), one can obtain a measure of water velocity.
The following instrument classes include this data product:
- 3-D Single Point Velocity Meter (VEL3D)