新疆地区定点形变秒采样仪器信号时频特征  

Time-Frequency Characteristics of Fixed-Point Deformation Second-Sampling Instrument Signals in Xinjiang

作　　者：赵莹 王迪晋 张燕 吴凯 余晨晖 ZHAO Ying;WANG Dijin;ZHANG Yan;WU Kai;YU Chenhui(Key Laboratory of Earthquake Geodesy,CEA,40 Hongshance Road,Wuhan 430071,China)

机构地区：[1]中国地震局地震大地测量重点实验室,武汉市430071

出　　处：《大地测量与地球动力学》2024年第6期648-653,共6页Journal of Geodesy and Geodynamics

基　　金：中国地震局震情跟踪定向工作任务(2023010210)。

摘　　要：分析新疆地区4类宽频带仪器秒采样数据在平静期的背景噪声,讨论各类仪器在地震波和风扰事件下记录信号的时频特征。结果显示,RZB-2型钻孔应变仪噪声水平最优,VP型垂直摆对高频信号(地脉动频段)的响应能力最优。仪器能否记录到更多地球物理信号或高频信息不仅与自身的噪声水平相关,更与其对该频段信号的响应能力有关。The background noise of the second sampling data of four kinds of broadband instruments in Xinjiang during quiet period is analyzed,and the time-frequency characteristics of the signals recorded by various instruments under seismic waves and wind disturbance events are discussed.The results show that the noise level of RZB-2 borehole strainmeter is the best,and the response ability of VP type vertical pendulum to high-frequency signals(microseisms frequency range)is the best.Whether the instrument can record more geophysical signals or high frequency information is not only related to its own noise level,but also related to its response ability to the signal in this frequency band.

关 键 词：定点形变 高频信号 时频特征 宽频带地震仪 

分 类 号：P315[天文地球—地震学]