Event Details
Indirect Fish Target Strength Estimation Using Adaptive Kernal Algorithm
Presenter: Dr. Marek Moszynski - Technical University of Gdansk, Department of Remote Monitoring Systems, ul. Narutowicza, Gdansk, POLAND
Supervisor:
Date: Fri, August 10, 2001
Time: 10:00:00 - 11:00:00
Place: EOW 430
ABSTRACT
Abstract
A typical approach to the problem of indirect fish target strength estimation from data collected using single-beam echosounders is based on inversion of probability density function (PDF) of measured fish echo level. However, ill conditioning of most inversion algorithms, small errors in input data, and inaccuracies in the assumed form of the kernel, may result in large errors at the output. The paper presents different approach that uses adaptive construction of the kernel under assumption of non-negative constraints in the obtained estimate of fish target strength PDF. As a result, a more reliable beam pattern PDF is obtained that leads to an unbiased and more accurate estimate of fish target strength PDF then offered by conventional (fixed kernel) methods.
Biography
Dr. Marek Moszynski got his Ph.D. degree from the Technical University of Gdansk in 1997 where is in now Assistant Professor in the Department of Remote Sensing. His research and teaching area is in signal processing, application of underwater acoustics to fisheries, microprocessors systems, and geographic information systems. He is author or co-author of over 50 scientific papers in these areas and has participated in several research projects in Poland and abroad. Dr. Moszynski is presently working with BioSonics in Seattle on a new scientific echosounder being developed there.
FREE AND OPEN TO THE PUBLIC
For Further Information Contact:
Dr. Adam Zielinski (721 8622)