The Research on Self-noise Accurate Estimation of a Seismometer Using Three-seismometer
SONG Cheng
ZHANG Yong
SHAO Pingyu
Abstract：Self-noise level is one of the most important parameters of seismometers.At present,according to seismic industry standards,self-noise power spectrum of seismometer is obtained from recording the same ground motion and transfer function of two-seismometer.However,the method is limited because it requires the accurate information about the transfer function of each seismometersmall errors in the transfer functions,which will cause relatively large errors in the calculated seismometer self-noise levels.Self-noise power spectrum of seismometer obtained from three-seismometer is proposed in the paper,based on correlation analysis of recordings from a common,coherent input signal in the frequency domain.The approach does not require accurate information about the transfer function of each seismometer,only in terms of cross-power spectra and autopower spectra of the recordings of the three seismometer connected to the same input signal.
Keywords：SeismometerSelf-nosiePower spectrumThree-seismometerLow noise amplifier
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 98-102 )