ADCP 55 kHz
Acoustic Doppler Current Profilers (ADCP) are hydroacoustic instruments, similar to sonars. ADCPs use the Doppler effect of sound waves that are scattered by particles in seawater over a depth range. The traveling time of sound waves gives an estimate of distance, and the increase (blue shift) or decrease (red shift) in frequency is converted into water current velocities.
Individual instruments of the above category, which are (or have been) connected to our observatories. Click an instrument for detailed information.
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