Acoustic Oceanographic Buoy Data Report - MakaiEx 2005
S.M. Jesus, sjesus@ualg.pt
A. J. Silva, asilva@ualg.pt
F. Zabel, fredz@wireless.com.pt
SiPLAB - FCT, University of
Algarve
Campus de Gambelas,
PT-8005-139 Faro, Portugal
Comments: download file (pdf )
Ref.: SiPLAB Report 04/05, FCT, University of Algarve,2005.
Abstract
It is now well accepted in the underwater acoustic scientific community
that below, say, 1 kHz acoustic propagation models are accurate enough
to be able to predict the received acoustic field up to the point of
allowing precise and reliable source tracking in range and depth with
only limited environmental information. This results from a large
number of studies both theoretical and with real data, carried out in
the last 20 years. With the event of underwater communications and the
necessity to increase the signal bandwidth for allowing higher
communication rates, the frequency band of interest was raised to above
10 kHz. In this frequency band the detailed knowledge of the
environment - acoustic signal interplay is reduced. The purpose of the
MakaiEx sea trial is to acquire data in a complete range of frequencies
from 500 Hz up to 50 kHz, for a variety of applications ranging from
high-frequency tomography, coherent SISO and MIMO applications, vector
- sensor, active and passive sonar, etc...The MakaiEx sea trial, that
took place off Kauai I. from 15 September - 2 October, involved a large
number of teams both from government and international laboratories,
universities and private companies, from various countries. Each team
focused on its specific set of objectives in relation with its
equipment or scientific interest. The team from the University of
Algarve (UALg) focused on the data acquired by their receiving Acoustic
Oceanographic Buoy - version 2 (AOB2) during six deployments in the
period 15 - 27 September. This report describes the AOB2 data set as
well as all the related environmental and geometrical data relative to
the AOB2 deployments. The material described herein represents a
valuable data set for supporting the research objectives of projects
NUACE - Non-cooperative Underwater Acoustic Channel Estimation -
FCT contract POSI/CPS/47824/2002, initiated in January 2004, namely
to fulfill NUACE's task 3 and 4 and RADAR - Environmental
Assessment with a Random Array of Acoustic Receivers - FCT contract
POCTI/CTA/47719/2002, initiated in October 2004., namely its tasks 2
and 3 devoted to the developement and testing of a field of sonobuoys.
ACKNOWLEDGMENT: this work was partially supported by
projects RADAR (POCTI/CTA/47719/2002) and NUACE
(POSI/CPS/47824/2002) from FCT, Portugal.