Radai provides 1D and 3D inversion of frequency domain EM data.
The laterally constrained 1D EM layered earth inversion (AEMinv) supports combined inversion of EM data and static magnetic field to acount for the effect of magnetic suscpetibility. The 1D inversion is well suited for GTK airborne data and interpretation of overburden thicknesses.
The 3D EM inversion (Lempo3D) is based on an approximate integral equation solution. It uses either multiple, arbitrarily oriented thick prism bodies ora large resistivity mesh model embedded in conductive 2-layer host medium. Lempo3D handles a large variety of EM systems and reponse types. Most importantly, it takes the resistivity of the host medium into account..