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