GPS浮标数据反演海浪谱的理论仿真与试验验证

	GPS浮标数据反演海浪谱的理论仿真与试验验证
	徐曦煜; 王振占; 叶沛; 许可
刊名	海洋学报
	2014
卷号	36 期号:7 页码:34-44
关键词	GPS浮标随机波面位移 P-M谱自相关函数高通滤波
ISSN号	0253-4193
其他题名	Theoretic simulation and campaign validation of ocean wave spectrum retrieval from GPS buoy measurements
中文摘要	GPS浮标作为一种新型的海洋测量设备,近年来在海面高度现场测量和星载高度计定标方面取得了重要应用。通过仿真试验对反演海浪谱的方法和流程进行研究,旨在探索从GPS浮标测量的海面高度序列中提取海浪谱的方法。首先,使用Longuest模型生成了海浪波面位移时间序列,并通过Pierson-Moscowitz风浪谱对波面位移的统计特性进行约束,其随机性由相位引入。结合典型潮汐和GPS浮标仪器噪声的仿真时间序列,合成了仿真时间长度1h的1Hz(每秒1次)随机海面高度序列。然后,利用自相关函数法,进行高通滤波和数据压缩,得到了仿真的海浪谱。该仿真结果和理论海浪谱非常接近,可满足海浪谱反演的需求。最后,通过山东石岛外海的GPS浮标现场试验,验证了本文提出的反演方法的适用性。本文的研究解决了GPS浮标反演海浪谱的关键问题,丰富了海浪谱反演的手段,拓展了GPS浮标的应用领域,有望为未来我国的星载波谱仪定标服务。
英文摘要	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.
收录类别	CSCD
语种	中文
CSCD记录号	CSCD:5173559
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/4537]
专题	国家空间科学中心_微波遥感部
推荐引用方式 GB/T 7714	徐曦煜,王振占,叶沛,等. GPS浮标数据反演海浪谱的理论仿真与试验验证[J]. 海洋学报,2014,36(7):34-44.
APA	徐曦煜,王振占,叶沛,&许可.(2014).GPS浮标数据反演海浪谱的理论仿真与试验验证.海洋学报,36(7),34-44.
MLA	徐曦煜,et al."GPS浮标数据反演海浪谱的理论仿真与试验验证".海洋学报 36.7(2014):34-44.