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| Applied processing for calculation of TEM in-loop full-zone apparent resistivity and 1-D inversion of field transferred from dB/dt response observed directly |
| JIANG Bang-Yuan, DU Qing-Feng |
| Institute of Geophysical and Geochemical Exploration,CAGS,Langfang 065000,China |
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Abstract The voltage response(dB/dt)is wildly used in TEM in-loop configuration; nevertheless, for layered earth,it has several defects in solution, such as unique valued, dual-valued, undefined valued and overshoot and undershoot phenomena. It is hoped that field response has not these defects. So if we want to observe field response directly,SQUID or flux-gate sensor should be added. Therefore the process of transferred dB/dt should be available. Of course it has some other difficult problems in calculation, for examples: how to get the first electromagnetic field strength and applied apparent depth formula. This paper tackles those problems and has solved them.
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Received: 01 March 2017
Published: 20 August 2017
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