The study of baseline shift error in strong-motion and ground tilting during co-seismic period with collocated GPS and strong-motion observations

详细信息    查看全文

• 作者：Rui Tu ; ^{turui-2004@126.com} ; Pengfei Zhang ^{zpf.333@163.com} ; Rui Zhang ^{zhangruiwkk@163.com} ; Jinhai Liu ^{267307171@qq.com} ; Xiaochun Lu ^{tutui@ntsc.ac.cn}
• 关键词：GPS ; Strong-motion ; Baseline shift error ; Ground tilting
• 刊名：Advances in Space Research
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：59
• 期：1
• 页码：24-32
• 全文大小：3816 K
• 卷排序：59

文摘

Strong-motion’s baseline shift error is very difficult to process precisely; it is mainly caused by the tilting, rotation of the ground and environment noises during the co-seismic period. In the study, we first studied how to effectively extract the strong-motion’s baseline shift error with GPS observation; this also provides a new way of correcting the baseline shift errors. Then we studied how to retrieve the ground tilting information of the station point with the collocated GPS and strong-motion observations, the information is an important input parameter of rotational seismology. In addition, both experimental result and seismic data show that the baseline shift error is mainly caused by the ground tiling and rotation during the co-seismic period. Also, there is a strong directly proportional relationship between the baseline shift error and ground tilting, of which the proportionality constant is approximately equal to the value of gravitational acceleration of the station.