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Abstract

Summary

What is a proper model to describe the IP effect in airborne time domain electromagnetic (TEM) measurement? The Cole-Cole relaxation model which characterizes a polarizable medium can be expressed either in terms of conductivity or resistivity, depending on the energizing sources (current or voltage) to be used. In either expression, the Cole-Cole model can be decomposed into a non-frequency dependent and frequency dependent part. The response is the convolution of the energizing source with the time domain expression of Cole-Cole model. We examine the response of a dc current source and a dc voltage source. We show that the Cole-Cole model expressed ass dispersive conductivity is a proper model for obtaining the airborne TEM IP response. We demonstrate this by the responses of a halfsine transmitter current waveform over a polarizable body, simulated with a wireloop.

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/content/papers/10.3997/2214-4609.201413877
2015-09-06
2024-04-24

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Understanding Airborne IP
Conference Proceedings 2015, 1 (2015); https://doi.org/10.3997/2214-4609.201413877
/content/papers/10.3997/2214-4609.201413877
/content/papers/10.3997/2214-4609.201413877
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