Changes

== Using EM.Terrano as an Asymptotic Field Solver ==

The simplest SBR simulation can be performed using a short dipole source with a specified field sensor plane. As an asymptotic EM solver, EM.Terrano then computes the electric and magnetic fields radiated by your dipole source in the presence of your multipath propagation environment. EM.Terrano's short dipole source and field sensor observable are very similar to those of [[EM.Cube]]'s other computational modules. You can also compute the far field radiation patterns of a dipole in the presence of surrounding scatterers or compute the Huygens surface data for use in [[EM.Cube]]'s other modules.

=== Defining a Hertzian Dipole Source ===

A short dipole is the simplest way of exciting a structure in [[EM.Terrano]]. It is also the closest thing to an omnidirectional radiator. The direction or orientation of the short dipole determines its polarization. Note that EM.Terrano does not offer an isotropic radiator as a source type because it is a polarimetric ray tracer. A short dipole source acts like an infinitesimally small ideal current source. A short dipole source appears as a small arrow in your scene.