GPS BUOY APPLICATION TO OFFSHORE WAVE, TSUNAMI AND TIDE OBSERVATION

Title:

GPS BUOY APPLICATION TO OFFSHORE WAVE, TSUNAMI AND TIDE OBSERVATION

DOI No:

10.1142/9789812701916_0087

Source:

COASTAL ENGINEERING 2004 (pp 1093-1105)

Author(s):

TOSHIHIKO NAGAI
Marine Information Division, Port and Airport Research Institute, 3-1-1, Nagase Yokosuka, 239-0826, Japan
HIDEAKI OGAWA
Marine Information Division, Port and Airport Research Institute, 3-1-1, Nagase Yokosuka, 239-0826, Japan
YUKIHIRO TERADA
Research Institute, Hitachi-Zosen Corporation, 2-2-11, Funa-machi, Taisho-ku, Osaka, 551-0022, Japan
TERUYUKI KATO
Earthquake Research Institute, University of Tokyo, 1-1-1, Yayoi, Bunkyo-ku, Tokyo, 113-0032, Japan
MASANOBU KUDAKA
Wave Information Department, Ecoh Corporation, 2-6-4, Kita-Ueno, Taito-ku, Tokyo, 110-0014, Japan

Abstract:

This paper introduced results of the field test of the GPS buoy wave observation conducted off the Ofunato-Port in Japan faced to the Northern Pacific Ocean at 53m deep. To secure good accuracy of the buoy motion measurement with cm order, RTK-system was applied with one on-land GPS station, 2km far from the GPS buoy. Vertical and two components of horizontal buoy motion were recorded with one-second interval continuously. Observed data were compared with coastal wave observation network data of acoustic sensors and coastal tide station data. The GPS buoy successfully observed ocean waves with wide frequency ranges from wind waves with a few seconds period to astronomical tides with one or half day period, including tsunamis and storm surges [note: http://www.tsunamigps.com and http://www.pari.go.jp/bsh/ky-skb/kaisyo/].

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