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IEVref:801-32-51ID:
Language:enStatus: Standard
Term: Doppler velocity logger
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Definition: acoustic device that determines its own velocity by measuring the Doppler shift of echoes from the bottom

Note 1 to entry: A Doppler velocity logger can be combined with an acoustic Doppler current profiler. When such a system is mounted on a moving ship, the bottom track velocity can be subtracted from the measured water velocity to give the net current profile.

Note 2 to entry: A correlation velocity logger is a related device that typically transmits two pulses at different positions. By virtue of being on a moving platform, the device uses the change in correlation between the two received signals to infer the platforms' velocity.


Publication date:2021-02
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