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Estimation and correction for the effect of sound velocity variation on GPS/Acoustic seafloor positioning: An experiment off Hawaii Island

Earth, Planets and Space volume 55, pages e17–e20 (2003)Cite this article

Abstract

A GPS/Acoustic experiment on the southeastern slope of Hawaii Island presented precise seafloor positioning in the condition of large water depth (2.5—4.5 km) and large velocity variations. We estimated sound velocity variations from acoustic ranging, and found that temperature variation can well explain the velocity variation. The effect of daily variation in the sound velocity amounted to +/- 0.7 m on acoustic ranging of 4—7 km with a fixed velocity structure. CTD data observed about every 3 hours could decrease the range residuals to +/- 0.4 m. These large residuals were fairly well canceled in the positioning of the array center of three acoustic transponders. The estimated precision of the array center positioning was about 3 cm in latitude and longitude.

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Authors and Affiliations

  1. Earthquake Research Institute, University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan

    Yukihito Osada, Toshihiko Kanazawa, Shigeru Nakao & Shin-ichi Sakai

  2. Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai, 980-8578, Japan

    Hiromi Fujimoto, Satoshi Miura & Aaron Sweeney

  3. Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, 92093-0205, USA

    John A. Hildebrand & C. David Chadwell

Authors
  1. Yukihito Osada
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  2. Hiromi Fujimoto
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  3. Satoshi Miura
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  4. Aaron Sweeney
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  5. Toshihiko Kanazawa
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  6. Shigeru Nakao
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  7. Shin-ichi Sakai
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  8. John A. Hildebrand
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  9. C. David Chadwell
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Correspondence to Yukihito Osada.

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Osada, Y., Fujimoto, H., Miura, S. et al. Estimation and correction for the effect of sound velocity variation on GPS/Acoustic seafloor positioning: An experiment off Hawaii Island. Earth Planet Sp 55, e17–e20 (2003). https://doi.org/10.1186/BF03352464

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  • DOI: https://doi.org/10.1186/BF03352464

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