[teleforce]

Actually Maxwell's equation become unintuitive and become very difficult to model when not using quaternion. Unlike other waveform for example sound, electromagnetic (EM) waves has polarization components that can be intuitively, properly and comprehensively modeled using quaternion. Currently we are using quaternion to model robust and reliable wireless PHY modulation based on polarization that can work in a very limited Line of sight (LoS) environment, the performance is much better than conventional wireless PHY.

[someguydave]

are you referring to a particular EM modeling software or codebase?

[teleforce]

I'm referring to the EM model of propagation including its polarization in 3D representing the real world scenario.