高频GPS数据地震应急处理方法研究  

High-frequency GPS Data Processing for Earthquake Emergency

作　　者：蔡华[1] 李敏[2] 刘晓霞[1] 

机构地区：[1]中国地震局地震预测重点实验室,中国地震局地震预测研究所,北京100036 [2]武汉大学卫星导航定位技术研究中心,武汉430079

出　　处：《地震》2016年第1期133-140,共8页Earthquake

基　　金：中国地震局地震预测研究所基本科研业务专项(2013IES0201)资助

摘　　要：对于GPS动态定位模式,高频（≥1Hz）GPS数据需要30s或者更高采样率的卫星钟差,而满足需要的IGS星历产品至少要延迟12~18d才能获得。显然,常规的GPS数据处理方法无法满足地震应急的需要。本文提出一种针对地震应急高频GPS数据处理方法,利用陆态网络GPS高频数据解算获得中国大陆区域高精度卫星钟差,进而解算获得测站地表瞬时形变位移,突破常规处理方法的限制,可在地震发生后仅数小时获得快速、准确、可靠的结果。这种方法在2013年芦山MS7.0级地震得到了实际应用。In GPS Kinematic Positioning mode, High frequency （≥1 Hz） GPS data pro cessing needs satellite clock error of sampling intervals of 30 s or higher rate. However, IGS ephemeris products that meet the needs will delay 12-18 d. Obviously, conventional GPS data processing can not meet earthquake emergency needs. A new processing method of high-frequency GPS data for earthquake emergency is put forward in this paper. The displacements of surface deformation can be obtained within several hours after earthquake occurrence. And this method was demonstrated in GPS data processing following the 2013 Ms 7.0 Lushan Earthquake.

关 键 词：GPS PPP动态定位 地震应急 地表瞬时形变位移 2013年芦山Ms7.0级地震 

分 类 号：P315.7[天文地球—地震学]