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Title:
GPS OCEAN WAVE MEASURING METHOD
Document Type and Number:
Japanese Patent JP3760243
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a GPS ocean wave measuring method for mounting a stand-alone GPS receiver to a buoy, acquiring a period of an ocean wave from a fluctuation of the buoy based on a GPS signal received by the receiver, and also acquiring a wavelength and a wave speed based on the period. SOLUTION: A vertical movement data of the GPS buoy is acquired based on the GPS signal received by the stand-alone GPS receiver 2 mounted in the buoy 1. A frequency corresponding to a peak value of wave height power of the ocean wave is identified and the period of the ocean wave corresponding to the frequency is determined by analyzing a spectrum of the vertical movement data. The wavelength and the wave speed at each spectrum can be determined from an approximate expression based on the period.

Inventors:
Yamaguchi Isao
Hirotaka Ikawa
Toshio Kasai
Masatoshi Zhang
Application Number:
JP2003318917A
Publication Date:
March 29, 2006
Filing Date:
September 10, 2003
Export Citation:
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Assignee:
Japan Aerospace Exploration Agency
International Classes:
G01C13/00; B63B22/00; G01S19/14; (IPC1-7): G01C13/00; B63B22/00; G01S5/14
Domestic Patent References:
JP10185564A
Other References:
加藤照之,外4名,実海域におけるGPS波浪計・津波計の性能確認実験,海洋開発論文集,2003年 7月,第19巻,839-844
John J.Myers,海洋工学ハンドブックIV,,株式会社 ラテイス,1971年 5月20日,第1版,300-301
加藤照之,外4名,実海域におけるGPS波浪計・津波計の性能確認実験,海洋開発論文集,2003年 7月,第19巻,839-844
John J.Myers,海洋工学ハンドブックIV,,株式会社 ラテイス,1971年 5月20日,第1版,300-301
Attorney, Agent or Firm:
Shigenobu Oshiro
Masuo Yamada
Fumio Sato