GPS Wave Observation System with Arrayed Buoys

Hidenobu Fujii, Nobuyoshi Kouguchi, Hiroshi Ishida, and Ichiro Deguchi

Abstract:	The long-period gravity wave, the wave period from some tens seconds to some minutes, induces not only the big sway of a ship moored and berthed in the harbor due to the horizontal long-distance motion of a water particle but also strong exfoliated flow and vortices near the harbor entrance. They cause serious problems on the safety navigation of vessels entering and leaving the harbor, however, this gravity wave has not been researched sufficiently yet. Then it is quite important to reveal the characteristics of this long-period gravity wave and to solve various problems induced by this wave. In this paper, the long-period gravity wave measurement system with arrayed buoys equipped with the kinematic GPS is proposed, which provides the precise propagational direction of the long-period gravity wave. Some proper array geometric forms are proposed, and the advantages/ disadvantage concerning of these arrays geometric forms are discussed. The comparison results are shown by simulation. From these simulational results, the linear form has a false direction due to a symmetric con- figuration and the single circular form could not estimate the directions of more than two coherent waves propagating from more than two directions. Finally from these simulations and analyses, the double triangular form is a suitable one among the proposed measurement systems.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	2733 - 2740
Cite this article:	Fujii, Hidenobu, Kouguchi, Nobuyoshi, Ishida, Hiroshi, Deguchi, Ichiro, "GPS Wave Observation System with Arrayed Buoys," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 2733-2740.
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