All-Weather Automatic Landing System Development and Testing 700581

The performance of automatic landing systems in use in jet transport aircraft today is degraded by variations in the ground radio guidance signals. These variations are mainly due to multipath effects and tend to inhibit routing coupled approach to touchdown especially in reduced visibility.

Autoland control employing inertial smoothing can compensate for ground beam anomalies including failures. This paper summarizes the testing done to date on such a system in the Boeing jet transport prototype.