Passive ranging of an airborne emitter by a single sensor

Details Passive ranging of an airborne emitter by a single sensor Passive ranging of an airborne emitter by a single sensor

1984-12-14

1985-12-10

Jordan, Charles T.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

364453, 364460, 235411, G01S 302, G06F 1558

Patent

active

045583234

ABSTRACT:
A method for the passive measurement of the range, velocity and course of a target aircraft relative to a test aircraft includes the steps of moving the test aircraft along a straight path, varying the speed of the test aircraft, and sequentially measuring the bearing angle from the test aircraft of pulsed or continuous radiation emitted from the target aircraft. A plot of the rays of radiation at each of the times of bearing measurement produces a geometry which can be solved arithmetically to provide the lengths of the rays. These lengths correspond to the distance of the target from the test aircraft. The invention may be used with equal effectiveness against multiple targets, simultaneously.

REFERENCES:
patent: 3171121 (1965-02-01), Solga
patent: 3304409 (1967-02-01), Snowdon et al.
patent: 3378842 (1968-04-01), Phillips
patent: 3866229 (1975-02-01), Hammack
patent: 3922533 (1975-11-01), Royal
patent: 3982246 (1976-09-01), Lubar
patent: 4179697 (1979-12-01), Golinsky

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