吴志露,刘焱雄,何秀凤,冯颖,彭琳,范士杰

• 1:国家海洋局第一海洋研究所
• 2:河海大学
• 3:中国石油大学

摘要(Abstract)：

针对基于沿海GPS站点坐标时间序列反演海潮负荷特征信息研究较少的问题,提出利用FFT与HHT提取海潮负荷信息,两种频谱方法原理各异,但都可将目标信息从原始数据中分离出。基于沿海站点的坐标时间序列,经小波去噪后进行海潮分潮特征信息提取试验,最后与3种全球海潮模型FES2004、NAO.99b和GOT4.7的模型值比较,评估两种方法的反演精度,结果显示:HHT、FFT都能够准确探测到海潮分潮信号,FFT全日潮周期反演结果优于HHT反演结果,半日潮周期反演精度相当;HHT边际谱的谱值为对应频率出现的可能程度,无法与模型值进行比较,而FFT振幅值为绝对值,其结果与模型值符合情况良好;在探测未知信号时,FFT可能会探测出虚假信号,而HHT更能真实反映信号的组成。

关键词(KeyWords)： HHT;FFT;沿海站点;精密单点定位;小波分析

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41374044,41274011);; 国家海洋局预报减灾司项目(1511311700008)

作者(Author): 吴志露,刘焱雄,何秀凤,冯颖,彭琳,范士杰

DOI: 10.16251/j.cnki.1009-2307.2017.01.021

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