JEM modeling and measurement for radar target identification

The jet engine modulation (JEM) phenomenon, observed in radar returns from the rotating structure of jet engines, has been successfully exploited for aircraft target identification in a number of experimental radar systems. We develop a parametric model based on the periodic modulation of the scattered return, motivated by the potential reduction in time-on-target for reliable target identification provided by parametric models, as well as gaining insight into the JEM phenomenon. We then compare the model with JEM measurements made with an experimental radar system. Finally, we discuss the implications for JEM-based target identification systems.