Differential emitter geolocation

DWPI Title: Geolocating method of wireless transmitter located on earth, involves using first and second differences to determine location of first transmitter
Abstract: An unknown location of a transmitter of interest is determined based on wireless signals transmitted by both the transmitter of interest and a reference transmitter positioned at a known location. The transmitted signals are received at a plurality of non-earthbound platforms each moving in a known manner, and phase measurements for each received signal are used to determine the unknown location.
Use: Geolocating method of wireless transmitter located on earth.
Advantage: Permits determination of the number of wavelengths in the differential paths to a given platform, which in turn permits very accurate relative position accuracy. Eliminates phase differences due to the clock rate error factor, and provides an even more highly over-determined system.
Novelty: The geolocating method involves determining a first difference between the first phase measurement associated with the first transmitter and the first phase measurement associated with the reference transmitter, and for each of the platforms, determining a second difference between the second phase measurement associated with the first transmitter and the second phase measurement associated with the reference transmitter. The first and second differences are used to determine the location of the first transmitter.
Filed: 11/2/2012
Application Number: US13667594A
Tech ID: SD 11810.0
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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