Siting the azimuth antenna such that its phase center is above the plane of approach lights will reduce the error but may violate obstacle clearance requirements. The intent is to locate the azimuth antenna structure completely underneath the plane of approach lights yet maintain signal quality by replacing the interfering light structures with transparent ones.
Computer modeling estimates the induced error due to existing lighting systems.
This paper presents results and gives recommendations for the minimum number of structures needing to be replaced by transparent ones.