Basic Study on Long Period Gravity Wave Observation System using MUSIC Method with GPS Arrayed Antenna Buoys

GPS 어레이 안테나 부이를 이용한 장주기 중력파 측정시스템에 관한 기초적 연구

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 and to solve various problems induced by this wave. The long-period gravity wave measurement system with arrayed buoys equipped with the kinematics GPS was already proposed, which provides the precise propagating direction of the long-period gravity wave. In this paper, the observation results of the long-period gravity wave measurement system are shown by the MUSIC method. And the propagating wave direction was estimated precisely enough in comparison with other results which used the other method.