Abstract: Systems and methods for accurately converting angular localizer data into rectilinear localizer data thereby allowing for improved localizer capture performance and stability. The systems and methods utilize information onboard an aircraft regarding the aircraft's current position and the destination runway's position to more accurately determine a distance measurement for converting angular deviations into rectilinear deviations.

Abstract: Instrument Landing System (“ILS”) localizer captures have historically been prone to performance degradations based upon erroneous estimates of the localizer deviation and deviation rate. The angular nature of the ILS beam and the relatively narrow trusted linear course guidance sector of the beam are the primary causes of many such issues. It is highly desirable to convert the angular guidance data into a rectilinear form when used by an autopilot and/or flight director systems, the latter of which allows for more consistent stability and performance with respect to distance to runway threshold. Systems and methods disclosed herein are for accurately converting angular localizer data into rectilinear localizer data, thus allowing for improved localizer capture performance and stability.