Based on the parameters of the horizontal coplanar system of Impulse and adopting the forward formula and the homogeneous

halfspace and pseudolayer halfspace model, this paper describes the algorithms for onedimensional search and phasor diagram

search. These algorithms usually deal with different models. One algorithm is weighed against the other by the resistivity

conversion of actually measured data, and the application effect of resistivity conversion is validated by the image of resistivity.