Low duty cycle navigation system

Details Low duty cycle navigation system Low duty cycle navigation system

1964-04-30

2000-03-21

Blum, Theodore M.

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

Directive

Position indicating

342174, 342385, G01S 302

Patent

active

060408014

ABSTRACT:
This invention relates to radio navigation systems and is particularly dited to means for transmitting range and azimuthal information to selected receivers only. More specifically this invention relates to a R-O navigating system in which the signal is so concealed in noise that the signal is of use only to friendly, as distinguished from enemy receivers. By this system enemy aircraft, in a military sense, cannot `home` on either the shipboard or land-based beacons. Mobile equipment of the system of this invention is passive and is, hence, not subject to detection.

REFERENCES:
patent: 2541040 (1951-02-01), Colin
patent: 2924820 (1960-02-01), Dishal et al.

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