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Striation-based source depth estimation with a vertical line array in the deep ocean.

Kunde Yang1, Liya Xu1, Qiulong Yang1

  • 1School of Marine Science and Technology, Northwestern Polytechnical University, Xi'an 710072, China ykdzym@nwpu.edu.cn, xuliya@mail.nwpu.edu.cn, yangqiulong@mail.nwpu.edu.cn, duanrui@nwpu.edu.cn.

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This study introduces a novel striation-based method for estimating underwater acoustic source depths using vertical line arrays. The technique effectively tracks acoustic striations to determine source locations with improved accuracy.

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Area of Science:

  • Ocean acoustics
  • Signal processing
  • Geophysical exploration

Background:

  • Accurate source depth estimation is crucial for underwater acoustic studies.
  • Traditional methods face challenges in complex oceanic environments.
  • Surface-reflected arrivals offer valuable information for source localization.

Purpose of the Study:

  • To propose a new striation-based method for estimating acoustic source depth.
  • To utilize broadband striation structures of direct and surface-reflected arrivals.
  • To develop a robust tracking algorithm for striation structures.

Main Methods:

  • Employing a vertical line array for acoustic data acquisition.
  • Applying an extended Kalman filter for tracking striation structures.
  • Developing a cost function to match measured and model-based striation traces.

Main Results:

  • Demonstrated the effectiveness of the striation-based method on real-world data.
  • Successfully estimated source depths using direct and surface-reflected arrivals.
  • Validated the tracking algorithm's performance in the South China Sea.

Conclusions:

  • The proposed striation-based method offers a reliable approach for underwater acoustic source depth estimation.
  • The extended Kalman filter provides robust tracking of acoustic striations.
  • This technique has practical applications in marine acoustic research and exploration.