Relativistic jets such as the misaligned BL Lac blazar M87 (see above banner, right panel) provide the greatest energy output among discrete astrophysical sources. However, fundamental aspects of jet emission are still unknown or explainable by competing phenomenological models. Despite observations of thousands of jets throughout the electromagnetic spectrum, the locus of the dominant emitting region, the relative importance of relativistic beaming versus particle acceleration for jet bright spots, or even the jet plasma composition are uncertain. To address these degeneracies, I have developed a pipeline for “‘Observing’ Jet Simulations” using parametric emission models based on physical mechanisms such as particle/magnetic equipartition, shear and current density to match wavelength-specific observations, including instrumentation– cadence and convolution.