A Study on Wave Observation System with GPS Arrayed Buoys by using MUSIC Method

Yoo, Yun-Ja; Song, Chae-Uk; Kouguchi, Nobuyoshi; Fujii, Hidenobu

Journal of Navigation and Port Research 2003;27(6):677-682.
Published online December 31, 2003.

A Study on Wave Observation System with GPS Arrayed Buoys by using MUSIC Method

Yun-Ja Yoo, Chae-Uk Song, Nobuyoshi Kouguchi, Hidenobu Fujii

Abstract

The long-period gravity wave, the wave period from some ten 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 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, but this gravity wave has not been searched sufficiently yet. Then it is quite important to reveal the characteristics of this long-period gravity wave ana to solve various problems induced by this wave. The long-period gravity wave measurement system with arrayed buoys installed the kinematic GPS was already proposed, which provides the precise propagating direction of the long-period gravity wave. In this paper, the observation results of the wave measurement system are shown by the MUSIC method. And the propagating wave direction was estimated precisely enough in comparison with other results used other method.

Key Words: Long-period gravity wave;MUSIC spectrum;Wave direction measurement system;Kinematic GPS;Arrayed buoys