| Abstract: | 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 |
| Genre: | Article |
| ProdID: | 70014666 |
| Citation Author: | Liu, H. P.; Peselnick, L. |
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| Citation End Page: | 544 |
| Citation Issue: | 4 |
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| Citation Language: | English |
| Citation Larger Work Title: | Geophysical Prospecting |
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| Citation Number Of Pages: | 8 |
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| Citation Search Results Text: | Improved phase-ellipse method for in-situ geophone calibration.; 1986; Article; Journal; Geophysical Prospecting; Liu, H. P.; Peselnick, L. |
| Citation Start Page: | 537 |
| Citation Volume: | 34 |
| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Improved phase-ellipse method for in-situ geophone calibration.; 1986; Article; Journal; Geophysical Prospecting; Liu, H. P.; Peselnick, L. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1986 00:00 -0600 |
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