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Dual Accelerometer Vector Sensor (DAVS) -REX'17 Sea Trial Data Report

P. Santos,
P. Felisberto,
F. Zabel,
SiPLAB, University of Algarve, Campus de Gambelas,
PT-8005-139 Faro, Portugal
A. Matos,
Faculty of Engineering, University of Porto and INESCTEC, Porto, Portugal

Comments: download file (cintal_rep).
Ref.: SiPLAB Report 02/18, SiPLAB, University of Algarve, February 2018.

A Dual Accelerometer Vector Sensor (DAVS) is a compact device, consisting of two triaxial accelerometers and one hydrophone aligned in a vertical plane. It was developed during the framework of the E.U. WiMUST project to, behind the directional of arrival estimation, enhance bottom characterization by the improvement of the bottom reflection paths and significantly attenuation of the direct and the surface reflection paths. The objective of this report is to present the data collected with the DAVS during the sea trial namely REX’17 Experiment and the respective processing thereof in order to comply with the planned objectives. The goal of the experiment was to evaluate the possibilities of combining this compact directive device (DAVS) installed on an AUV (MARES) for: platform self-localization, bottom characterization and port security for intruder detection. The signals were emitted by a Lubell source in the 1 to 3 kHz band. The data was acquired from July 11th to 13th, 2017, in the area of Naval Base of Lisbon (BNL), Alfeite, Lisbon. During this trial, the DAVS was mounted on the autonomous underwater vehicle, MARES AUV, from INESC-TEC, Oporto at the first two days, acquiring data in different geometries and different depths, and for the last day it was moored in a water depth of 2.5 m (approximately).

ACKNOWLEDGMENT: this work was supported by CINAV and the Portuguese Navy.