Title :
Bearing estimation error analysis using laser acoustic sensor measurements on a hydrodynamic surface
Author :
Antonelli, L.T. ; Kirsteins, I.P.
Author_Institution :
Naval Undersea Warfare Center, Newport, RI, USA
Abstract :
The basic operation of a novel laser-based sensor is investigated. A low power laser beam emanating from a laser Doppler velocimeter is used to interrogate an air-water interface for underwater sound detection. The sensor measures the normal velocity of the vibrations of the pressure release air-water interface. The objective of this paper is to discuss the feasibility and fundamental limitations on using the laser-based acoustic field velocity measurements of hydrodynamic air-water interface to determine acoustic field direction of arrival. This paper identifies the various contributions to bearing uncertainty using the Cramer-Rao lower bounds to establish the limitations of determining the bearing of the in-water sound
Keywords :
direction-of-arrival estimation; oceanographic techniques; optical radar; sonar; underwater sound; Cramer-Rao lower bounds; acoustic field velocity; acoustics; air-water interface; arrival direction; bearing estimation; bearing uncertainty; direction of arrival; error analysis; hydrodynamic surface; laser Doppler velocimeter; laser acoustic sensor; laser-based sensor; lidar; measurement technique; ocean; sea surface; sonar; underwater sound; underwater sound detection; vibrations; Acoustic beams; Acoustic sensors; Acoustic signal detection; Direction of arrival estimation; Error analysis; Laser beams; Power lasers; Underwater acoustics; Velocity measurement; Vibration measurement;
Conference_Titel :
OCEANS 2000 MTS/IEEE Conference and Exhibition
Conference_Location :
Providence, RI
Print_ISBN :
0-7803-6551-8
DOI :
10.1109/OCEANS.2000.881730
