Aircraft interfere with car navigation systems on approach. An example from practice

During low landing approaches by a certain type of aircraft, interference can occur in the navigation systems of vehicles on the highway below. Investigations have shown that this interference is due to electromagnetic interference from the aircraft’s 400 Hz on-board power supply, which is used in modern commercial aircraft for energy supply. The interference results from coupling into a sensor in the car, which leads to the observed malfunctions. To effectively reduce the interference, a precise classification of the coupling mechanism of the electromagnetic interference is required.