Improved phase-ellipse method for in-situ geophone calibration
For amplitude and phase response calibration of moving-coil electromagnetic geophones two parameters are needed, namely, the geophone natural frequency, f0, and the geophone upper resonance frequency fu. 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 off0 andfu depends on the phase sensitivity, f(δφ/δf) For some commercial geophones f(δφ/δf) atfu can be an order of magnitude less than the sensitivity atf0. 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 f0 andfu on a commercial geophone.
Citation Information
Publication Year | 1986 |
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Title | Improved phase-ellipse method for in-situ geophone calibration |
DOI | 10.1111/j.1365-2478.1986.tb00480.x |
Authors | Huaibao P. Liu, L. Peselnick |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Geophysical Prospecting |
Index ID | 70014666 |
Record Source | USGS Publications Warehouse |