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Doklady Earth Sciences

, Volume 444, Issue 1, pp 606–609 | Cite as

Passive ocean acoustic tomography

  • O. A. Godin
  • V. V. Goncharov
  • N. A. Zabotin
Oceanology

Abstract

The possibility to apply natural acoustic ocean noise in the ocean and noise of distant vessels as sounding signals in order to determine the physical parameters of a water layer is considered in this paper. We developed the methods making it possible to suppress the non-diffuse components of noise produced, e.g., by local vessels and to account for hydrophone motion. These methods are applied to the noise records obtained in the course of a year-long experiment on long-range sound propagation in the Pacific Ocean. We confirmed experimentally our theoretical predictions as to the possibility of retrieving deterministic acoustic ray travel times in a nonuniform environment from a mutual correlation function of imperfectly diffuse (gradually anisotropic and spatially nonuniform) noise without invoking any data on its source. We performed passive measurements of sound velocity in the ocean with a relative error of about 0.1% by correlation of noise fields recorded with vertical aerials. This accuracy approaches that needed for oceanological applications. Further investigations are necessary to study the feasibility of passive acoustic tomography and thermometry in the ocean at distances of tens and hundreds of kilometers and the possibility to use simpler arrays not equipped with hydrophone positioning systems.

Keywords

Sound Velocity DOKLADY Earth Science Hydrophone Acoustic Tomography Noise Field 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    W. Munk, P. Worcester, and C. Wunsch, Ocean Acoustic Tomography (Cambridge Univ. Press, Cambridge, 1995).CrossRefGoogle Scholar
  2. 2.
    V. V. Goncharov, V. Yu. Zaitsev, V. M. Kurtepov, et al., Ocean Acoustic Tomography (IPF RAN, Nizhni Novgorod, 1997) [in Russian].Google Scholar
  3. 3.
    O. A. Godin, S. V. Burenkov, D. Yu. Mikhin, et al., Dokl. Akad. Nauk 349(3), 398–403 (1996).Google Scholar
  4. 4.
    O. A. Godin, D. Yu. Mikhin, and D. R. Palmer, Izv. Ross. Akad. Nauk FAO 36(1), 131–142 (2000).Google Scholar
  5. 5.
    V. A. Akulichev, V. V. Bezotvetnykh, S. I. Kamenev, et al., Dokl. Akad. Nauk 381(2), 243–246 (2001).Google Scholar
  6. 6.
    L. M. Brekhovskikh and Yu. P. Lysanov, Fundamentals of Ocean Acoustics (Springer, New York, 2003).Google Scholar
  7. 7.
    M. L. Levin and S. M. Rytov, The Theory of Equilibrium Heat Fluctuations in Electrodynamics (Nauka, Moscow, 1967) [in Russian].Google Scholar
  8. 8.
    O. A. Godin, J. Acoust. Soc. Am. 125(4), 1960–1970 (2009).CrossRefGoogle Scholar
  9. 9.
    O. I. Lobkis and R. L. Weaver, J. Acoust. Soc. Am. 110(6), 3011–3017 (2001).CrossRefGoogle Scholar
  10. 10.
    O. A. Godin, Phys. Rev. Lett. 97, 054301 (2006).CrossRefGoogle Scholar
  11. 11.
    R. Snieder, J. Acoust. Soc. Am. 121(5), 2637–2643 (2007).CrossRefGoogle Scholar
  12. 12.
    O. A. Godin, J. Acoust. Soc. Am. 128(2), 600–610 (2010).CrossRefGoogle Scholar
  13. 13.
    A. B. Baggeroer and E. K. Scheer, the NPAL Group, J. Acoust. Soc. Am. 117(3), 1643–1665 (2005).CrossRefGoogle Scholar
  14. 14.
    O. A. Godin, N. A. Zabotin, and V. V. Goncharov, Geophys. Rev. Lett. 37, L13605 (2010).CrossRefGoogle Scholar
  15. 15.
    N. A. Zabotin and O. A. Godin, Acta Acust. United Acust. 97(1), 44–53 (2011).CrossRefGoogle Scholar

Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • O. A. Godin
    • 1
    • 2
  • V. V. Goncharov
    • 3
  • N. A. Zabotin
    • 1
    • 2
  1. 1.Cooperative Institute for Research in Environmental SciencesUniversity of Colorado at BoulderBoulderUSA
  2. 2.National Oceanic and Atmospheric Administration Earth System Research LaboratoryBoulderUSA
  3. 3.Shirshov Institute of OceanologyRussian Academy of SciencesMoscowRussia

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