Efficient approach to computing travel time with the parabolic equation model

Author:

Heaney Kevin D.1,Campbell Richard L.1

Affiliation:

1. Applied Ocean Sciences , 11006 Clara Barton Drive, Fairfax Station, Virginia 22039, USA kevin.heaney@appliedoceansciences.com , richard.campbell@appliedoceansciences.com

Abstract

An efficient method for computing the travel time of an acoustic wave using the parabolic equation model is presented. The frequency derivative of the acoustic phase is the differential travel time associated with a propagation in range. By taking this difference across closely spaced frequencies this method computes the acoustic travel time. This method requires the computation of the field at two frequencies rather than over the full band. The method compares well with other travel time methods for four different cases, including deep water, upslope and shallow water, and a three-dimensional propagation environment.

Funder

CTBTO

Office of Naval Research

Publisher

Acoustical Society of America (ASA)

Subject

General Medicine

Reference15 articles.

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2. CTBTO (2023). https://ctbto.org/ (Last viewed October 20, 2023).

3. The GEBCO_2021 Grid—A continuous terrain model of the global oceans and land,2021

4. Heaney, K. D. (1997). Inverting for Source Location and Internal Wave Strength Using Long Range Ocean Acoustic Signals, Ph.D. thesis, University of California San Diego, San Diego, CA.

5. Three-dimensional parabolic equation modeling of mesoscale eddy deflection;J. Acoust. Soc. Am.,2016

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