... at low frequency. A new quantity, referred to as the ISIP datum, is defined so that it equals zero at low frequencies for any frequency-independent (non-chargeable) conductivity distribution. Thus any non-zero response in the ISIP data indicates the presence of chargeable material. Once the data...

... SUMMARY We develop a new technique for forward modeling the three-dimensional electromagnetic (EM) response of chargeable material in the time domain. The method can be applied to any type of transmitter (loop or grounded electrodes) or receiver (H or E field measurements) and operates...