INDEPENDENT INSTRUMENT LANDING SYSTEM MONITOR

摘要

A system and method of monitoring received instrument landing system (ILS) signals onboard an aircraft includes performing a pre-approach sampling of the received ILS signals to thereby generate pre-approach phase ILS data. A statistical approach course of the aircraft is determined based at least in part on the pre-approach phase ILS data. A determination is made as to when the aircraft is below a predetermined activation altitude and, when it is, approach sampling of the received ILS signals is performed to generate approach phase ILS data. The approach phase ILS data is compared to the statistical approach course to determine a course deviation. An alert signal is selectively generated when the course deviation exceeds a predetermined magnitude.

主权项

1. A method of monitoring received instrument landing system (ILS) signals onboard an aircraft, the method comprising the steps of:
performing, with a processor, a pre-approach sampling of the received ILS signals to thereby generate pre-approach phase ILS data; determining, in the processor, a statistical approach course of the aircraft based at least in part on the pre-approach phase ILS data; determining, in the processor, when the aircraft is below a predetermined activation altitude; and when the aircraft is below the predetermined activation altitude:
performing, with the processor, approach sampling of the received ILS signals to generate approach phase ILS data;comparing, in the processor, the approach phase ILS data to the statistical approach course to determine a course deviation; andselectively generating, with the processor, an alert signal when the course deviation exceeds a predetermined magnitude.