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| | Abstract | | We have conducted field experiments for evaluating practical utility of a multiple transmission DC resistivity profiling using Code Division Multiple Access (CDMA) technique. In a resistivity profiling with plural current injection, it can be possible to inject current at multiple points simultaneously by using coded current waveforms among which covariance between mutual waveforms equal to zero. Multiple transmission resistivity profiling technique has a potential to make it possible very rapid measurement comparing to mono-transmission conventional resistivity profiling. In this paper, we have conducted some filed experiments for discussing workability and noise-robustness. The results of field experiments showed that efficiency of a multi-transmission resistivity measurement was quite high regarding to current duration time. We have found that erratic low-frequency noises affects a bad effect to result but it was able to be improved by processing of measured potential waveform. |
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