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Figure 1
Electrode configuration of a 4EM system.
Figure 2
Orientation, conductivity, and potential of each face of a cube.
Figure 3
Top right had corner of finite difference matrix. C is the multiplier of the unknown potential at each adjacent face.
Figure 4
Convergence plot for an isotropic infinite space.
Figure 5
Convergence plot for an anisotropic infinite space, transverse direction
Figure 6
Convergence diagram for an anisotropic infinite space, longitudinal direction
Figure 7
Potential on the surface and at depth in an isotropic infinite halfspace
Figure 8
Potential on the surface and at depth in an anisotropic infinite halfspace, transverse direction
Figure 9
Potential on the surface and at depth in an anisotropic infinite halfspace, longitudinal direction
Figure 10
Geometries for analysis of 4EM system response. Top figure: infinite space. Central figure: infinite halfspace with probes on surface. Bottom figure: layer inclusion in infinite space.
Figure 11
Predicted response of the 4EM system at depths from 3 to 7 mm
Figure 12
Probe with 5 degree positioning error
Figure 13
Effect of 5 degree positioning error on 4EM system response