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Precise Positioning of Underwater Static Objects without Sound Speed Profile
A new method of positioning underwater static objects is presented based on Global Positioning System (GPS) acoustics. It adopts a model in which the ranging errors follow a quadratic relation with the travel time of acoustic signals. A least squares technique is used to estimate the
effective sound speed. The precise location of an object can then be made. The simulation shows that the method is capable of determining the three-dimensional position with an accuracy of 5 cm in a water depth of 500 m. The operating time is respectively 5-10 minutes in 50-100 m depth and
20-30 minutes in 500 m depth.
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Keywords: Underwater; object; positioning; sound speed profile; static
Document Type: Research Article
Affiliations: 1: Geomatics College, Shandong University of Science and Technology, Qingdao, China,Key Laboratory of Surveying and Mapping Technology on Island and Reef, SBSM, Qingdao, China 2: Key Laboratory of Submarine Geosciences of State Oceanic Administration, Hangzhou, China 3: Geomatics College, Shandong University of Science and Technology, Qingdao, China
Publication date: April 1, 2011
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