【摘要】 借助PPP软件,利用位于日本及周边国家的IGS跟踪站和国家海洋局GPS业务观测站数据,提取2011年3月11日日本里氏9.0级特大地震的震时、震后地表震动信息和水汽信息。首先采用动态PPP方法得到GPS站点的震时水平运动轨迹、震时三维坐标时间序列以及站点上空大气可降水量的动态变化;然后采用静态PPP方法得到GPS站点震前和震后的单天解坐标。通过对计算结果进行分析和比较,揭示了GPS站点的震时地表三维形变过程和震后地表永久性形变,验证了日本震后灾区的降雪过程,为GPS技术用于地震监测和灾害预警提供有价值的基础资料。更多还原

【Abstract】 A massive Ms 9.0 earthquake occurred on 11 March 2011,off the Pacific coast of the northeastern part of the Japanese main land.In this paper,using developed PPP software,the co-seismic and post-seismic surface movement information and precipitable water vapor were extracted from IGS stations data located in Japan and the surrounding countries and State Oceanic Administration operational GNSS stations data.First,the co-seismic horizontal motion trajectory,three-dimensional coordinate time series and the dynamic changes of precipitable water vapor in the zenith direction for GPS sites were achieved using kinematic PPP.Then,using static PPP,this paper obtained the pre-seismic and post-seismic three-dimensional coordinate in 24-hours solution of GPS sites.Based on the calculating results,this paper reveals the co-seismic surface movement process and post-seismic permanent deformation of GPS sites,and verifies the snowfall process in Japan disaster area.These measurements are therefore of high value for earthquake monitoring and disaster warning using GPS technology.更多还原