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Volume 34 Number 4
  • E-ISSN: 1365-2478

Abstract

ABSTRACT

For amplitude and phase response calibration of moving‐coil electromagnetic geophones two parameters are needed, namely, the geophone natural frequency, , and the geophone upper resonance frequency . The phase‐ellipse method is commonly used for the in situ determination of these parameters. For a given signal‐to‐noise ratio, the precision of the measurement of and depends on the phase sensitivity, For some commercial geophones at can be an order of magnitude less than the sensitivity at. In this paper we present an improved phase‐ellipse method with increased precision. Compared to measurements made with the existing phase‐ellipse methods, our method shows a 6‐ and 3‐fold improvement in the precision, respectively, on measurements of and on a commercial geophone.

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/content/journals/10.1111/j.1365-2478.1986.tb00480.x
2006-04-27
2024-04-29

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References

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  • Article Type: Research Article

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