Figure 2.

Three-dimensional reentry core analysis. A, Example of a program-recognized reentry core. Crosses represent electrodes. Filled black circles represent core electrodes. Black polygon represents wavetip path around the core. B, The final 3D Cartesian coordinate system. The x-y plane is the optimal 2D plane, on which the rectangle encompasses the reentry core. The core electrodes and the wavetip path below the rectangle are gray and above the plane are black. C and D, The content of B with different viewing angles and the definitions of dx, dy, and dz.