== Defining Sources & Observables for Your SBR Simulation ==
Like every other electromagnetic solver, EM.Terrano's SBR ray tracer requires an excitation source and one or more observables for generation of simulation data. EM.Terrano offers several types of sources and observables for a SBR simulation. You can mix and match different source types and observable types depending on the requirements of your modeling problem. The available source types are(click on each type to learn more about it):
* '''[[#Defining Transmitter Sets | Transmitter]]'''
* '''[[#Defining_a_Hertzian_Dipole_Source | Hertzian Dipole]]'''
The available observables types are (click on each type to learn more about it):
* '''[[#Defining Receiver Sets | Receiver]]'''