Development of the Deep-Sea GPS Buoy Wave Data Processing System
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Accession number;06A1016258
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| Title;Development of the Deep-Sea GPS Buoy Wave Data Processing System |
| Author;
SHIMIZU K.
(Port And Airport Res. Inst., Yokosuka, Jpn)
NAGAI T.
(Port And Airport Res. Inst., Yokosuka, Jpn)
SATOMI S.
(Port And Airport Res. Inst., Yokosuka, Jpn)
LEE J. H.
(Coastal Dev. Inst. Of Technol., Tokyo, Jpn)
KUDAKA M.
(Ecoh Corp., Tokyo, Jpn)
FUJITA T.
(Hitachi Zosen Corp., Osaka, Jpn)
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Journal Title;Kaiyo Kogaku Shinpojiumu (CD-ROM)
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Journal Code:S0108B
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ISSN:
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VOL.19th;NO.;PAGE.ROMBUNNO.27(2006)
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| Figure&Table&Reference;FIG.8, TBL.1, REF.13 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Newly developed GPS buoy is supposed to be the future principal offshore wave and tsunami observation equipment for Japanese NOWPHAS (Nationwide Ocean Wave information network for Ports and HArbourS), for GPS buoy sensor is possible to be located deeper and more offshore area than existing seabed installed typed wave gauges and is able to be used for earlier tsunami detection. Nevertheless, for relatively high frequency wind wave observation, heaving and rolling response of the moored buoy must be considered to obtain precise and reliable offshore wind-wave data. This paper proposed a new data processing system of the GPS buoy's vertical and horizontal fluctuation records, with consideration of the buoy's frequency response characteristics, by comparing the long-term offshore observation data of the GPS buoy of 100m deep and the seabed installed wave and current gauges of 27m deep, both were installed off the Muroto-cape fishery port faced to southern Pacific Ocean of Japan. Frequency banded wave analysis based on the directional wave spectrum are proposed. Six frequency bands from the lowest band f1, with corresponding period longer than 30s, to the highest band f6, with corresponding period shorter than 6s were defined. For the frequency banded wave height analysis, f6 wave heights are to be obtained with consideration of heaving response function of the buoy. Frequency banded wave directions are to be obtained in the intermediate bands of f2, f3, f4 and f5. Wave climate characteristics of the two stations were also compared. (author abst.) |
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