[[File:PMOM123.png]]
'''Note that in this case the RCS is defined for a finite-sized target in the presence of an infinite background structure.''' The scattered ? θ and f φ components of the far-zone electric field are indeed what you see in the 3D far field visualization of radiation (scattering) patterns. Instead of radiation or scattering patterns, you can instruct EM.Cube to plot 3D visualizations of sσ<sub>?θ</sub>, sσ<sub>fφ</sub> and the total RCS. To do so, you must define an RCS observable instead of a radiation pattern. Follow these steps:
* Right click on the '''Far Fields''' item in the '''Observables''' section of the Navigation Tree and select '''Insert New RCS...''' to open the Radar Cross Section Dialog.
* The resolution of RCS calculation is specified by '''Angle Increment''' expressed in degrees. By default, the ? θ and f φ angles are incremented by 5 degrees.* At the end of a planar MoM simulation, besides calculating the RCS data over the entire (spherical) 3D space, a number of 2D RCS graphs are also generated. These are RCS cuts at certain planes, which include the three principal XY, YZ and ZX planes plus one additional constant f-cut. This fourth plane cut is at f φ = 45° by default. You can assign another f φ angle in degrees in the box labeled '''Non-Principal Phi Plane'''.
At the end of a planar MoM simulation, in the far field section of the Navigation Tree, you will have the ? θ and f φ components of RCS as well as the total radar cross section. You can view a 3D visualization of these quantities by clicking on their entries in the Navigation Tree. The RCS values are expressed in m<sup>2</sup>. The 3D plots are normalized to the maximum RCS value, which is also displayed in the legend box.<br />
[[File:PMOM124.png]]