Passive ranging of an airborne emitter by a single...

G - Physics – 01 – S

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343/84

G01S 3/02 (2006.01) G01S 3/52 (2006.01)

Patent

CA 1254292

ABSTRACT OF THE DISCLOSURE Method for passively determining the range to a target from a test platform. The method comprises travelling at a constant velocity a course in the test platform which is straight; detecting at the platform the presence of an energy signal radiating from the target, and sampling said energy signal at three discrete times. Generating for each of said energy signal samples a first detection signal responsive to its angle of arrival at the platform, and a second detection signal responsive to its frequency on arrival at the platform; and storing said detection signals. The range to the target is then determined utilizing the stored detection signals and the test platform velocity and position; then generating a target indication signal representative of the range of the target.

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