The transient fields of simple radiators from the point of view of remote sensing of the ground subsurface


  • Adel Z. Botros,

  • Samir F. Mahmoud


The electromagnetic transient response of electric line sources and current-carrying loops above a two-layered stratified ground is considered at both early and late times. The early time fields are obtained using the geometrical ray theory, while the late time fields are treated in a manner following the work of Wait, leading to closed-form solutions. The limiting case of a homogeneous ground is considered by more exact means and comparisons are made with the case of late time response of the layered ground model. It is shown that the depth and the conductivity of the overburden layer may be detected from the behavior of the transient fields.