利用小波分解重构提取高频GPS数据静态永久性变形

基金项目: 地震行业科研专项基金资助项目(201108004)；国家自然科学基金资助项目(41021003,40974044,41074501,40974013)；中国科学院动力大地测量学重点实验室基金资助项目(0906361042)

详细信息

Resolving Static Offset from High-rate GPS Data by Wavelet Decomposition-Reconstruction Algorithm

¹State Key Laboratory of Geodesy and Earth’s Dynamics,Institute of Geodesy and Geophysics,CAS;²University of Chinese Academy of Sciences;³National Earthquake Infrastructure Service

Funds: 地震行业科研专项基金资助项目(201108004)；国家自然科学基金资助项目(41021003,40974044,41074501,40974013)；中国科学院动力大地测量学重点实验室基金资助项目(0906361042)

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。
- 小波分解重构 /
- 高频GPS数据 /
- 精密单点定位(PPP) /
- 静态永久性变形
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 high-rate GPS data processed in PPP mode are comparable with the twiceintegrated 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 separatethe static offset induced by main shock, strong aftershock and the post-seismic deformation.
- wavelet decomposition-reconstruction algorithm /
- high-rate GPS data /
- precisepoint positioning (PPP) /
- static offset