Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Reexamination Certificate
2009-08-17
2011-12-13
Tarcza, Thomas (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
C342S413000
Reexamination Certificate
active
08077089
ABSTRACT:
A method of geolocating a stationary transmitter observed by a fixed receiver device and at least two receiver devices, at least one of the receiver devices moving includes obtaining wavelength-scaled phase difference measurements between pairs of receiver devices, and obtaining a result lattice of possible locations of the transmitter, one location more probable than the remainder. A method of geolocating a moving transmitter observed by a plurality of fixed or nearly fixed receiver devices, and a moving receiver device, includes obtaining wavelength-scaled phase difference measurements from the plurality of fixed or nearly fixed receiver devices to obtain a shape of the transmitter trajectory, measuring the phase difference between the moving receiver device and at least one of the plurality of fixed or nearly fixed receiver devices to obtain a phase error residual, and moving an estimated starting point of the transmitter to obtain a best-fit residual.
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Blomenhofer, Helmut, Hein, Gunter W., and Walsh, David, IAPG, University FAF Munich, “On-The-Fly Carrier Phase Ambiguity Resolution for Precise Aircraft Landing,” Sixth International Technical Meeting of Satellite Division of The Satellite Division of the Institute of Navigation, 1993, pp. 821-830.
Erickson, Caroline, The University of Calgary, Canada, “An Analysis of Ambiguity Resolution Techniques for Rapid Static GPS Surveys Using Single Frequency Data,” Fifth International Technical Meeting of Satellite Division of The Satellite Division of the Institute of Navigation, 1992, pp. 453-462.
Nguyen Nga X
Quarles & Brady LLP
Rincon Research Corporation
Tarcza Thomas
LandOfFree
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