Accession Number:

ADA230003

Title:

On Modeling High-Frequency Acoustic Scatter from a Basic Arctic Under-Ice Experiment: The Benchmark Ice-Block Problem

Descriptive Note:

Abstract

Corporate Author:

NAVAL OCEANOGRAPHIC AND ATMOSPHERIC RESEARCH LAB STENNIS SPACE CENTER MS

Report Date:

1990-01-01

Pagination or Media Count:

1.0

Abstract:

High-frequency underwater acoustic propagation and scattering in the presence of the underside of the Arctic ice canopy have been studied in the last decade. Promising computer simulation models and some good experimental data have resulted from these studies. While presenting a brief overview of the Arctic modeling achievements, this talk concentrates primarily on the need for more benchmark modeling-experimental efforts. The ice-block reverberation experimental data taken by Francois and Garrison is used as an illustration. Under-ice acoustic scattering models based on various approaches Kirchhoff, edge diffraction, and finite element are used to analyze the ice-block data and comparisons of accuracy versus computation effort will be presented. The presentation concludes with the suggestion that a need exists for more Arctic under-ice acoustic benchmark cases. mm

Subject Categories:

  • Snow, Ice and Permafrost
  • Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE