Method and system for calculating full-time apparent resistivity of time-domain transient horizontal electric field

The invention provides a method and system for calculating the full-time apparent resistivity of a time-domain transient horizontal electric field. The method includes obtaining field acquired time-domain recording data including two electric fields mutually perpendicular to each other and Ry(t), carrying out time-domain filtering, superposing and eliminating flying spots for the time-domain recording data obtained in the previous step, calculating the complete waveforms of upper and low steps, calculating the electric fields of the upper and low steps on phi direction, and calculating the full-time apparent resistivity Pw(t) through the electric field of the upper step.