Publication Detail

Acoustic Doppler Velocimeter Flow Measurement from an Autonomous Underwater Vehicle with Applications to Deep Ocean Convection

Yanwu Zhang, Knut Streitlien, James G Bellingham
14 pp.
MITSG 02-01J
$4.00 DOM

The authors present a new modality for direct measurement of ocean flow, achieved by combining the resolution and precision of an acoustic Doppler velocimeter with the mobility of an au8tonomous underwater vehicle. To obtain useful measurements, two practical integration issues must first be resolved: the optimal location for mounting the velocimeter probe to the vehicle, and alignment of the velocimeter with the vehicle's attitude sensors. Next, it is shown how to extract earth-referenced flow velocities from the raw measurements, the technique verified by a tow tank experiment. The authors then describe mission configuration and a signal processing for a deployment in the Labrador Sea. Analysis of the vertical flow velocity data not only shows that this form of measurement can detect ocean convection, but also gives detailed information about convection's spatial structure.

type: Technical reports

Parent Project

Project No.: 1999-R/RT-2/RCM-4
Title: Distributed Observatories for the Coastal Environment

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