Title :
Signal processing strategies for a bathymetric sidescan sonar
Author :
Denbigh, Philip N.
Author_Institution :
Sch. of Eng., Sussex Univ., Brighton, UK
fDate :
7/1/1994 12:00:00 AM
Abstract :
A dominant source of errors in swath bathymetry is acoustic interference. In 1989 the author published an analysis of these errors and predicted depth accuracies for a system which reduced their effect by averaging. This present paper shows how a considerable improvement in performance may be obtained by a variety of signal processing strategies that include the use of several widely spaced receivers and the elimination of the most unsatisfactory measurements before averaging. Simulations show how impressive sea bed profiles can be produced with a single ping, even at low signal-to-interference ratios
Keywords :
acoustic imaging; acoustic signal processing; bathymetry; geophysical techniques; oceanographic techniques; seafloor phenomena; sonar; acoustic interference; acoustic measurement technique; averaging; bathymetry; ocean; sea bed profile; sea depth; seafloor topography; sidescan sonar; sonar; sonar signal processing; swath bathymetry; widely spaced receivers; Acoustic measurements; Acoustic signal processing; Backscatter; Frequency; Interference; Sea measurements; Sea surface; Signal processing; Sonar measurements; Time measurement;
Journal_Title :
Oceanic Engineering, IEEE Journal of
