Study of 3-D ATEM modeling including surface topography based on FDTD method

Abstract

Based on the finite different time domain (FDTD) method, we implemented the forward modeling of 3-D airborne transient electromagnetic method (ATEM) including surface topography. In the process of ATEM survey the measuring surface is not a flat topography and inevitably there are ups and downs. This leads to the actual measurement data in addition to contain useful information of underground structures, mixed with the influence of the terrain. A research on the topographic effects of ATEM forward modeling study has important guiding significance to actual measurement and the interpretation of the measurement data. In this paper, through comparative analysis of different terrain types of terrain influence, such as hills, valleys, had some preliminary understanding.