First, we create an RCS observable with 1 degree increments in both phi and theta directions. We also create two field sensors -- one with a z-normal underneath the aircraft, and another with an x-normal along the length of the aircraft.
[[Image:ff settings.png|thumb|left|200px150px|Figure 1: Geometry of the periodic unit cell of the dispersive water slab in EM.Tempo.]][[Image:ff settings.png|thumb|left|200px150px|Figure 1: Geometry of the periodic unit cell of the dispersive water slab in EM.Tempo.]]