Interferomeric synthetic aperture radar altimeter

Communications: directive radio wave systems and devices (e.g. – Directive – Position indicating

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342 25, 342463, 342457, G01S 302

Patent

active

060258004

ABSTRACT:
Aircraft position determination system includes a transmitter to transmit a signal, and two receivers to receive the transmitted signal reflected from the terrain below the aircraft, and a phase comparison apparatus operating from the two receiver's inputs. A processor determines position based on the output from the phase comparison apparatus.

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patent: 5051749 (1991-09-01), Stoyle
patent: 5126748 (1992-06-01), Ames et al.
patent: 5185608 (1993-02-01), Pozgay
patent: 5260708 (1993-11-01), Auterman
patent: 5828332 (1998-10-01), Frederick

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