Changes
/* Array Factor */
<math> \mathbf{E_{tot}^{ff}}(\theta,\phi) = \mathbf{E_0^{ff}}(\theta,\phi) \sum_{m=1}^{N_x} \sum_{n=1}^{N_y} \sum_{l=1}^{N_z} w_{ijk}
e^{j \left\[ (m-1)(k_0 S_x sin \theta cos \phi + \Delta\Psi_x ) + (n-1)(k_0 S_y sin \theta sin \phi + \Delta\Psi_y ) + (l-1)(k_0 S_z cos \theta + \Delta\Psi_z ) \right\] } </math>
== Electromagnetic Scattering and Radar Cross Section ==
