Improved phase-ellipse method for in-situ geophone calibration.

Geophysical Prospecting
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For amplitude and phase response calibration of moving-coil electromagnetic geophones 2 parameters are needed, namely the geophone natural frequency, fo, 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 of fo and fu depends on the phase sensitivity, f(delta PHI/delta PHIf). For some commercial geophones (f(delta PHI/delta PHI) at fu can be an order of magnitude less than the sensitivity at fo. Presents an improved phase-ellipse method with increased precision. Compared to measurements made with the existing phase-ellipse methods, the method shows a 6- and 3-fold improvement in the precision, respectively, on measurements of fo and fu on a commercial geophone.-from Authors

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Improved phase-ellipse method for in-situ geophone calibration.
Series title Geophysical Prospecting
Volume 34
Issue 4
Year Published 1986
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Geophysical Prospecting
First page 537
Last page 544
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