利用GPS阵列观测数据提取地震波信息的波束聚焦法  

METHOD OF BEAM FORMING FOR EXTRACTING SEISMIC WAVE INFORMATION BY USING GPS ARRAY DATA

作　　者：陆亚英[1] 伍吉仓[1] 孟国杰[2] 胡丛玮[1] 

机构地区：[1]同济大学测量与国土信息工程系,上海200092 [2]中国地震局地震预测研究所,北京100036

出　　处：《大地测量与地球动力学》2010年第5期68-72,共5页Journal of Geodesy and Geodynamics

基　　金：公益性行业科研专项基金(200708030);国家自然科学基金(40674004;40671155)

摘　　要：介绍一种利用GPS阵列高频观测数据提取地震面波信息的波束聚焦法。通过在GPS坐标序列的垂直分量中加入模拟的瑞利波信号,得到GPS阵列观测站模拟地震波记录,分析了波束聚焦法在不同信噪比下提取地震波信号的能力。结果表明,当信噪比为1.5时,不能获得正确的慢度估值;当信噪比为3时,提取的慢度估值接近理论值。A method of beam forming for processing high-rate GPS data and extracting seismic wave information is introduced. Simulated seismic waves of each GPS station are synthesized by adding simulated Rayleigh waves into vertical component of GPS coordinates series. The capacity of beam forming to extract seismic wave information of different SNR （ signal to noise ratio） is analyzed. The results indicate that, the correct value of slowness cannot be obtained when the SNR is 1.5, while it is close to the theoretical value when the SNR ratio is 3.

关 键 词：波束聚焦 GPS 高频数据 地震波 慢度 

分 类 号：P315.61[天文地球—地震学]