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Detection of Instrument Gain Problems Based on Body-Wave Polarization: Application to the Hi-Net Array

机译:基于体波偏振的仪器增益检测:在高网阵列中的应用

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摘要

Monitoring and assessing instrument performance and response are crucial to various seismological analyses that utilize the seismic signal recorded by the instrument. One of the important components of the instrument response is the gain or the amplification factor that determines the amplitude of the recorded wave arrival. We introduce a new method to detect problems in the gain of three-component seismographs by examining the body-wave polarization. Anomalous gain of a certain component causes P- and S-wave polarization to be distinct from expected values, allowing one to identify the issue in the instrument. The method is applied to the High-Sensitivity Seismograph Network (Hi-net) stations between 2004 and 2016, and 305 out of 790 stations are identified to have issues at various time periods. The detections are confirmed by comparison with the Hi-net daily calibration pulses. Utilization of teleseismic body-wave polarization information is an effective way to detect instrument gain problems without physically examining the instrument, which is particularly advantageous for instruments such as borehole or ocean-bottom sensors that cannot be accessed easily.
机译:监测和评估仪器性能和响应对于使用仪器记录的地震信号的各种地震分析至关重要。仪器响应的重要组成部分之一是确定记录波到来的幅度的增益或放大因子。我们通过检查体波极化来介绍一种新方法来检测三分地震仪增益中的问题。某个组件的异常增益导致P-和S波极化与预期值不同,允许一个识别仪器中的问题。该方法应用于2004和2016之间的高灵敏度地震仪网络(Hi-Net)站,790个站中的305个识别出在各种时间段内存在问题。通过与Hi-Net每日校准脉冲进行比较来确认检测。特点ism-波偏振信息的利用是检测仪器增益问题的有效方法,而无需物理检查仪器,这对于诸如无法容易地访问的钻孔或船舶底部传感器的仪器特别有利。

著录项

  • 来源
    《Seismological research letters》 |2019年第2appa期|共7页
  • 作者

    Park Sunyoung; Ishii Miaki;

  • 作者单位

    Harvard Univ Dept Earth &

    Planetary Sci 20 Oxford St Cambridge MA 02138 USA;

    Harvard Univ Dept Earth &

    Planetary Sci 20 Oxford St Cambridge MA 02138 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 地震学;
  • 关键词

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