【摘要】 研究了利用小波分解重构提取高频GPS数据静态永久性变形的方法。通过对El Mayor-Cucapah地震和东日本大地震两次地震高频GPS数据的处理和分析表明,PPP模式处理的高频GPS数据能够获取和强震仪相近的短周期强运动位移信息,并且保留了静态永久性变形信息;利用小波分解重构可以高精度地估计高频GPS动态位移中的静态永久性变形,有效区分主震和余震造成的静态永久性变形以及震后蠕滑位移。更多还原

【Abstract】 This paper focuses on the research of resolving static offset from high-rate GPS data by wavelet decomposition-reconstruction algorithm.After processing and analyzing the high-rate GPS data of El Mayor-Cucapah earthquake and Tohuko-Oki earthquake in precise point positioning(PPP)mode,we find that the short-period waveforms captured by highrate GPS data processed in PPP mode are comparable with the twice-integrated strong-motion records and the former one also could retain the static offset signal.Static offset resolved by decomposition-reconstruction algorithm from the high-rate GPS data is helpful to separate the static offset induced by main shock,strong aftershock and the post-seismic deformation.更多还原