Communications: directive radio wave systems and devices (e.g. – Aircraft landing system
Patent
1985-08-14
1987-07-14
Tubbesing, T. H.
Communications: directive radio wave systems and devices (e.g.,
Aircraft landing system
342 56, G01S 1386
Patent
active
046805877
ABSTRACT:
In a single-frequency precision guidance landing system, the use of a DME interrogator in the aircraft and a DME receiver at the ground installation, each tuned to the same DME channel frequency, to uniquely interrogate a selected ground station and hence identify it by virtue of its replies being synchronous in the aircraft with the interrogations, the interrogations and the replies also being used to obtain range to the ground installation. This technique uses airborne already-installed DME interrogators for selective interrogation of a desired landing installation, thereby to eliminate any need to add additional special purpose equipment to the aircraft to accomplish the desired uniqueness of interrogation and ground installation identification achieved by this invention.
REFERENCES:
patent: 4010465 (1977-03-01), Dodington et al.
patent: 4069412 (1978-01-01), Foster et al.
patent: 4126859 (1978-11-01), Bohm
patent: 4162495 (1979-07-01), Prill
patent: 4429312 (1984-01-01), Chisholm
patent: 4454510 (1984-06-01), Crow
Gabala James A.
Sundstrand Data Control Inc.
Tubbesing T. H.
Wanner James A.
Williamson Harold A.
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