Ground control and guidance method under investigation at Royal Aeronautical Establishment is ground-based secondary radar tracking system in which aircraft range, azimuth and elevation, with respect to given location on ground, are measured and compared with precalculated flight path; deviations from computed profile are then transmitted to aircraft where they are converted to instrument or autopilot commands; experimental guidance system for laboratory evaluation during 1968 and its basic principles of radar interferometry are described together with elements of system.
Precision guidance for V/STOL
Flight
Flight International ; 93 , n 3075
1968
Article (Journal)
English
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