Modulation of aircraft guidance lights

An aircraft, comprising:

• a sensor tuned to receive light of a specific range of wavelengths, the light being emitted by one or more taxiway lights and the light from the taxiway lights having an informational signal modulated thereon the informational signal providing the locations of the taxiway lights;
• a processing system coupled to the sensor and configured with software to interpret the informational signal received by the sensor;
• and
• program code running on the processing system, the program code configured to determine the location of the aircraft on the taxiway based on the informational signal associated with the light received by the sensor from one or more of the taxiway lights, wherein the program code is configured to conformally map a representation of an outside boundary of a taxiway on a combiner of a HUD to line up closely with an outside view through the combiner the locations of the taxiway lights being used to ensure registration of the representation of the outside boundary with the taxiway lights.