基于两道互相关模型的地震计自噪声测试分析

摘要

In this paper,a seismometer self-noise program with method of windowing average periodogram was made based on Matlab program and two cross correlation model. Two seismic monitoring systems were set to observe seismometer′s self-noise in Jixian Seismic Station, Tianjin and in Xibozi Seismic Station, Beijing. Compared the self-noise results of the two seismic stations, we can get one true seismometer′s self-noise spectrum with one suitable protective cover on the seismometers.%基于经典的两道互相关分析方法，采用Matlab软件编写加窗平均周期图法的地震计自噪声计算程序，在天津市蓟县地震台、北京市延庆县西拨子地震台对两台相同地震计进行自噪声观测实验。对比两个台站的地震计自噪声功率谱值结果，发现进行合理防护有助于得到真实的地震计自噪声功率谱值。