Self-noise tests on seismic dataloggers
Xu Weiwei
Abstract：The self-noises of the seismic dataloggers have significant meaning for self-noise measurement of seismometers and dynamic range evaluation of broadband seimographs.In this study,we measured and analyzed the self-noises of six types of imported seismic dataloggers widely used in Chinese seismic observations based on multi-channel correlation analysis method.The results showed that self-noises of all six types of dataloggers are well below NLNM model when frequency domain is below 1 Hz in both high-gain and unity-gain modes by sensitivity conversion factor 750 V·s/m;however,for the frequency domain higher than 1 Hz,self-noises of the six types of dataloggers interlace with NLNM model,hence much care should be taken according to the goals of seismic observation.Reftek-130/130S and Q330HRS with high-gain sampling mode might be the preferable choice for the seismometer's self-noise measurements.
Keywords：seismic dataloggerself-noisehigh-gain
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：8( 806-813 )