A parametric sonar performance calculator

A Desktop Calculator for Parametric Fuzzy Arithmetic

Detecting Atlantic herring by parametric sonar.

The difference-frequency band of the Kongsberg TOPAS PS18 parametric sub-bottom profiling sonar, nominally 1-6 kHz, is being used to observe Atlantic herring. Representative TOPAS echograms of herring layers and schools observed in situ in December 2008 and November 2009 are presented. These agree well with echograms of volume backscattering strength derived simultaneously with the narrowband S...

Passive Sonar Performance Modeling

Accurate passive acoustic (ASW) performance modeling requires high-fidelity environmental inputs, accurate acoustic propagation and noise modeling as well as the integration of the statistics of the detection of quiet signals in a dynamic environment. In this paper we present the combination of Parabolic Equation modeling with state of the art statistical signal processing to be able to incorpo...

Achieving High Performance Sonar-based Wall-following

In this paper we develop a technique to achieve robust high performance real-time wallfollowing behavior of a mobile robot in an indoor office environment, more specifically, in a corridor environment. The mobile robot achieves increasingly better performance by learning the environment’s (most important) features in successive runs through it. This allows the robot to perform the task repeated...

Sonar Performance Predictions Incorporating Environmental Variability

Perfect spatial/temporal knowledge of the ocean environment is rarely available for evaluation of sonar performance. Instead, performance prediction is often done with acoustic models assuming idealized inputs. The current capability of many such models is superb; realistic inputs, however, often are not available, and this is the central focus of the present paper. The prediction of sonar perf...