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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, pagese17–e20(2003)
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.
Chadwell, C. D., F. N. Spiess, J. A. Hildebrand, L. E. Young, G. Percell, Jr., H. Dragert, Deep-sea geodesy: Monitoring the ocean floor, GPS World, 9, 44–55, 1998.
Chadwell, C. D., F. N. Spiess, J. A. Hildebrand, and H. Dragert, Seafloor geodetic evidence of episodic spreading 25 km east of the Juan de Fuca Ridge, EOS Trans. AGU, 83, Fall Meet. Suppl., Abstract T22A-1130, 2002.
Fujimoto. H., S. Miura, Y. Osada, H. Shiobara, T. Kanazawa, A. Sweeny, J. A. Hildebrand, and C. D. Chadwell, Deployment of seafloor positioning system for the monitoring of seismic coupling at the Japan Trench off Sanriku, EOS Trans. AGU, 82, Fall Meet. Suppl., Abstract G41A-0212, 2001.
Fujimoto, H., M. Mochizuki, K. Mitsuzawa, T. Tamaki, and T. Sato, Ocean bottom pressure variations in the southeastern Pacific following the 1997–98 El Niño event, Geophys. Res. Lett., 30, 10.1029 2002GL016677, 2003.
Miura, S., A. Sweeney, H. Fujimoto, H. Osaki, E. Kawai, R. Ichikawa, T. Kondo, Y. Osada, C. D. Chadwell, Evaluation of accuracy in kinematic GPS analyses using a precision roving antenna platform, EOS Trans. AGU, 83, Fall Meet. Suppl., Abstract G52A-0959, 2002.
Spiess, F. N., C. D. Chadwell, J. A. Hildebrand, L. E. Young, G. H. Purcell, and Jr., H. Dragert, Precise GPS/Acoustic positioning of seafloor reference points for tectonic studies, Phys. Earth. Planet. Inter., 108, 101–112, 1998.
Zumberge, J. F., M. B. Heflin, D. C. Jefferson, M. M. Watkins, and F. H. Webb, Precise point positioning for the efficient and robust analysis of GPS data from large network, J. Geophys. Res., 102, 5,005–5,017, 1997.
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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) doi:10.1186/BF03352464
- seafloor positioning
- acoustic ranging
- sound velocity
- Hawaii Island