As an asymptotic EM simulator, EM.Terrano computes the polarimetric electric field at every receiver location including amplitude and phase of all three X, Y, Z field components as well as the total field magnitude. In wireless propagation modeling for communication system applications, the received power at the receiver location is more important than the field values. Wireless coverage maps commonly refer to the received power levels at different locations in a given site. In order to compute the received power, you need three pieces of information:
* '''Total Transmitted Power (EIRP)''': This requires knowledge of the baseband signal power, the transmitter chain [[parameters]], the transmission characteristics of the transmission line connecting the transmitter circuit to the transmitting antenna and the radiation characteristics of the transmitting antenna.
* '''Channel Path Loss''': This is computed through SBR simulation.
* '''Receiver Properties''': This includes the radiation characteristics of the receiving antenna, the transmission characteristics of the transmission line connecting the receiving antenna to the receiver circuit and the receiver chain [[parameters]].
The received power P<sub>r</sub> in dBm is found from the following equation: