Geolocation leveraging spot beam overlap
First Claim
1. A method of providing an estimate of a location of a user receiver device, the method comprising:
- emitting, from at least one vehicle with at least one of a known orbit or a known path, at least one spot beam on Earth;
receiving, with the user receiver device, a signal from the at least one spot beam as the at least one spot beam sweeps over the user receiver device as time progresses to obtain an amplitude of the signal from the at least one spot beam; and
calculating, with the user receiver device, the estimate of the location of the user receiver device by using;
a known position of the at least one vehicle, a known direction and pattern of the at least one spot beam, and multiple amplitudes of the signal measured over time from within the at least one spot beam, as the at least one spot beam sweeps over the user receiver device over time.
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Accused Products
Abstract
A method and system are disclosed for providing an estimate of a location of a user receiver device. The method and system involve emitting from at least one vehicle at least one spot beam on Earth, and receiving with the user receiver device a signal from at least one spot beam. In one or more embodiments, at least one vehicle may be a satellite and/or a pseudolite. The method and system further involve calculating with the user receiver device the estimate of the location of the user receiver device according to the user receiver device'"'"'s location within at least one spot beam. In some embodiments, when the user receiver device receives signals from at least two spot beams, the user receiver device calculates the estimate of the location of the user receiver device to be located in the center of the intersection of at least two spot beams.
35 Citations
46 Claims
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1. A method of providing an estimate of a location of a user receiver device, the method comprising:
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emitting, from at least one vehicle with at least one of a known orbit or a known path, at least one spot beam on Earth; receiving, with the user receiver device, a signal from the at least one spot beam as the at least one spot beam sweeps over the user receiver device as time progresses to obtain an amplitude of the signal from the at least one spot beam; and calculating, with the user receiver device, the estimate of the location of the user receiver device by using;
a known position of the at least one vehicle, a known direction and pattern of the at least one spot beam, and multiple amplitudes of the signal measured over time from within the at least one spot beam, as the at least one spot beam sweeps over the user receiver device over time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A system of providing an estimate of a location of a user receiver device, the system comprising:
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at least one vehicle with at least one of a known orbit or a known path, wherein the at least one vehicle emits at least one spot beam on Earth; and the user receiver device, wherein the user receiver device comprises; at least one radio frequency (RF) antenna, wherein the at least one RF antenna receives a signal from the at least one spot beam as the at least one spot beam sweeps over the user receiver device as time progresses; and a processor, wherein the processor calculates the estimate of the location of the user receiver device by using;
a known position of the at least one vehicle, a known direction and pattern of the at least one spot beam, and multiple amplitudes of the signal measured over time from within the at least one spot beam, as the at least one spot beam sweeps over the user receiver device over time. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46)
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Specification