Measurements and Analysis of Reverberation, Target Echo and Clutter.

摘要

This project was a joint collaboration between Defence Research and Development Canada--Atlantic (DRDC Atlantic) and the Applied Research Laboratory of Pennsylvania State University (ARL/PSU) to analyze and model reverberation, target echo, and clutter data in shallow water. The primary outputs of the collaboration were manuscripts for publication in conference proceedings and refereed journals. Secondary outputs were improved models and algorithms. This report provides a summary for the full 5-year period of the grant: 2006-2011. Overall, the main accomplishments of the 5-year period were as follows: (1) submission and publication of journal articles on the Rapid Environmental Assessment reverberation methodology that had been the focus of measurement and modeling efforts over the previous decade; (2) participation in the ONR Reverberation Modeling Workshops and the development of benchmark solutions for some of the problems; (3) extension of the fast reverberation modeling approach to handle range-dependent environments and bistatic geometry; (4) development of a Clutter Model for direct comparison with towed array beam time series in a range-dependent clutter environment; (5) initial work on modeling target echo and time spreading of the target echo; (6) extension of the normal-mode reverberation modeling approach to handle sub-bottom reverberation, including range-dependent environments; and (7) design of experiments, participation in sea trials, model-data comparisons, and analysis of towed array reverberation and clutter data. The year-by-year accomplishments are listed in the 'Main Accomplishments' section of the report.