superposition of signal
1.In order to apply the basic principle of a new EM method of exploration to practice and to provide some bases for developing equipment, the following three problems are analyzed and discussed: When the source signal is a sharp electromagnetic pulse, the output waveforms of the second-order band-pass filter of incident wave and reflected waves; the inversion method by using the waveform of transient superposition of incident waveform-front and reflected waveform-fronts to get electric conductivity and thickness of strata; and the key problem in the design of sounding equipment.
