Aircraft position determining system

Details Aircraft position determining system Aircraft position determining system

1985-05-23

1987-05-26

Blum, Theodore M.

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

Directive

Beacon or receiver

342462, 342 46, G01S 124

Patent

active

046689540

ABSTRACT:
An aircraft position determining system including an on-board radio altimeter which cooperates with a ground based transponder/beacon located at a position A. The radio altimeter is adapted as a distance meter and comprises means (9, 14, 15, 16) for shifting the frequency of the local oscillation signal. The system has a range sufficient to enable it to operate in a second predetermined volume defined with respect to the position A which includes a first volume defined by the lateral distance accuracy (d) and vertical distance accuracy (h) of the position determined by an independent on-board guidance device. The exact position of the aircraft when close to A is determined by at least two successive measurements of distance from to the position A.

REFERENCES:
patent: 3699571 (1972-10-01), Sanders
patent: 4126859 (1978-11-01), B/o/ hm
patent: 4250505 (1981-02-01), Kirner
patent: 4358763 (1982-11-01), Strauch
patent: 4513447 (1985-04-01), Carson

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