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Updated: Mar 11, 2026

Sediment Core Extrusion Method at Millimeter Resolution Using a Calibrated, Threaded-rod
Published on: August 17, 2016
Investigation of horizontal refraction on Florida Straits continental shelf using a three-dimensional Gaussian ray
Sean M Reilly1, Gopu R Potty1, David Thibaudeau2
1Department of Ocean Engineering, University of Rhode Island, Narragansett, Rhode Island 02882, USA campreilly@my.uri.edu, potty@egr.uri.edu.
Abstract:
Acoustic transmission loss measurements from the calibration operations (CALOPS) experiment for the Shallow Water Array Performance (SWAP) program included horizontally refracted returns that were as much as 30° away from the true bearing between source and receiver. In many cases, the in-shore refracted path was 20 dB stronger than the true bearing path. In this study CALOPS transmission loss measurements at 415 Hz are compared to predictions from a three-dimensional Gaussian ray bundling model. The geoacoustic model that provides good model-data comparison is consistent with the geologic and sediment core data collected at the location but differs slightly from the bottom model used at lower frequencies (206 and 52.5 Hz) in a previous study.
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