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No Access Submitted: 17 November 2004 Accepted: 04 July 2005 Published Online: 05 October 2005

  • Depth-shifting of shallow water guide source observations

The Journal of the Acoustical Society of America 118, 2224 (2005); https://doi.org/10.1121/1.2010309
Lisa M. Zurka)
  • Electrical and Computer Engineering, Portland State University, 1900 SW Fourth Avenue, FAB 160-17, Portland, Oregon 97207
    • Brian H. Traceyb)
  • NEUROMetrix, Inc., 62 Fourth Ave., Waltham, Massachusetts 02451
    • more...View Affiliations

    • a)Electronic mail: [email protected]

      b)Work was done when the author was with MIT Lincoln Laboratory, 244 Wood Street, Lexington, Massachusetts 02420.

    View Contributors
    • Lisa M. Zurk
    • Brian H. Tracey
    ABSTRACT
    In theory, matched field processing offers the significant benefit of higher signal gains and increased localization capability. However, this has not been robustly observed in practice because of inherent uncertainties about details of the shallow water propagation environments which limit the prediction of the channel response. The use of guide sources to directly measure the transfer function between source and receiver arrays has been proposed as a means for reducing mismatch. However, the guide source measurement only provides a measured transfer function at the guide source location. In this paper a method of depth-shifting guide source observations is proposed, making it possible to estimate transfer functions for points in the ocean other than the guide source location. The proposed depth-shifting process does not require knowledge of environmental parameters. The theoretical background for the technique is developed below and its range of applicability is examined

    ACKNOWLEDGMENTS

    The authors would also like to thank William Kuperman, Hee Chun Song, and Philippe Roux for helpful feedback about depth-shifting concepts.

    REFERENCES
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    1. © 2005 Acoustical Society of America.

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