偏振分析算法测定井下地震计方位角偏差  

To measure the azimuth deviation of the bore-hole seismograph using polarization analysis method

作　　者：龙剑锋[1] 张学应[1] 骆佳骥[1] 赵希磊[1] 

机构地区：[1]安徽省地震局,中国合肥230031

出　　处：《地震地磁观测与研究》2016年第1期86-90,共5页Seismological and Geomagnetic Observation and Research

基　　金：测震台网基金骨干培训专项(20140312)"震后测震应急流动观测台网布局应用研究"项目资助

摘　　要：基于P波质点的振动方式与初动方向,采用偏振分析算法,计算8次近震数据构建偏振椭球的协方差矩阵方程,得到特征向量值,估算地震计的相对安装方位,对比得到井下地震计方位角偏差。本文分析计算阜南井下台地震观测波形数据,得出地震计三分向输出极性正常与水平方位偏差约9°。Based on the P wave particle vibration and the P wave onset, the azimuth deviation of the borehole seismograph by comparing the azimuth of the epicenter relative to the earthquake meter which is calculated from the feature vector of the co-variance matrix of the polarized ellipsoid according the eight seismic signals is measured through the polarization analysis method. The polarities of three components of the Funan bore-hole seismometer are normal and the azimuth deviation is about 9° by the seismic signal.

关 键 词：偏振分析法 STA/LTA 方位角偏差 P波 特征向量值 

分 类 号：P315.6[天文地球—地震学]