Theoretic simulation and campaign validation of ocean wave spectrum retrieval from GPS buoy measurements

Xu Xiyu; Wang Zhenzhan; Ye Pei; Xu Ke

doi:10.3969/j.issn.0253-4193.2014.07.005

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Xu Xiyu, Wang Zhenzhan, Ye Pei, Xu Ke. Theoretic simulation and campaign validation of ocean wave spectrum retrieval from GPS buoy measurements[J]. Haiyang Xuebao, 2014, 36(7): 34-44. doi: 10.3969/j.issn.0253-4193.2014.07.005

Citation:

Xu Xiyu, Wang Zhenzhan, Ye Pei, Xu Ke. Theoretic simulation and campaign validation of ocean wave spectrum retrieval from GPS buoy measurements[J]. Haiyang Xuebao, 2014, 36(7): 34-44. doi: 10.3969/j.issn.0253-4193.2014.07.005

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Theoretic simulation and campaign validation of ocean wave spectrum retrieval from GPS buoy measurements

doi: 10.3969/j.issn.0253-4193.2014.07.005

1.
The CAS Key Laboratory of Microwave Remote Sensing, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China
2.
The CAS Key Laboratory of Microwave Remote Sensing, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100039, China

Received Date: 2013-07-11
Rev Recd Date: 2014-04-20

Abstract

Abstract

The purpose of this paper was to investigate the method of retrieving ocean wave spectrum from GPS buoy sea surface height time series. GPS buoy,an innovative instrument on ocean topography measurement,played an important role in in-situ sea level measurements and satellite altimetry calibration during past years. This paper demonstrated the method and procedure of wave spectrum retrieval by simulation experiments. Firstly,the wave surface elevation time series were generated based on the Longuest model,and the statistical characteristics were constrained by the Pierson-Moscowitz wind wave spectrum,and the randomicities were introduced from the wave phase. Along with the simulated tide height and GPS buoy instrument noise time series,the 1 Hz (one point per second) random sea surface time series of 1 hour length were synthesized. Afterward,the simulated wave power spectrum was acquired by the auto-correlation function method,containing high-pass filter and compression. The simulated spectrum was pretty close to the theoretic one,and could fulfill the requirements of ocean wave spectrum retrieval. Finally,the retrieving method presented in this paper was validated by the in-situ GPS buoy campaign in the offshore of Shidao,Shandong Province. The study in this paper solved the key issues of the new technology,enriched the approaches of ocean wave spectrum retrieval,explored the application of GPS buoy,and could be served for China's forthcoming satellite radar wavimeter.
- GPS buoy,
- random wave surface elevation,
- P-M spectrum,
- auto-correlation function,
- high-pass filter

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References(16)

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