Microwave landing system for use on a back course approach

Details Microwave landing system for use on a back course approach Microwave landing system for use on a back course approach

1986-10-08

1988-02-02

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Beacon or receiver

342 35, G01S 116

Patent

active

047231262

ABSTRACT:
The invention provides independent guidance and monitoring integrated into an MLS landing system and a scaled-down MLS take-off or missed approach guidance system useable at small airports. An added fixed beam precision guidance system is integrated into the MLS time sequence format. The fixed beam guidance system is based upon the concept of using paired fixed overlapping beams, sequentially radiated by different fixed antennas (80 and 81), oriented to left and right of a prescribed guidance path. The paired beams overlap at the prescribed guidance path in such a manner that an aircraft departing or making a missed approach on such path will intercept equal signal intensities to indicate an on-course condition. Conversely, when the aircraft is off-course to one side of the prescribed path, it will intercept a stronger signal intensity for the fixed guidance beam which is directed to that side of the prescribed path and a weaker signal intensity for the fixed beam which is directed to the other side of the prescribed path.

REFERENCES:
patent: 4061297 (1977-12-01), Foster
patent: 4306238 (1981-12-01), Enein
patent: 4306239 (1981-12-01), Enein
patent: 4333081 (1982-06-01), Hofgen
patent: 4429312 (1984-01-01), Chisholm
patent: 4635064 (1987-01-01), Chisholm

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