Geolocation using guided surface waves
First Claim
Patent Images
1. A navigation unit, comprising:
- a guided surface wave receive structure configured to obtain electrical energy from a guided surface wave traveling along a terrestrial medium, the guided surface wave having a wave front incident at a complex Brewster angle of the terrestrial medium;
a processor;
a memory;
an application comprising machine readable instructions stored in the memory that, when executed by the processor, cause the navigation unit to at least;
identify when the guided surface wave is received by the guided surface wave receive structure;
determine a current location of the navigation unit based at least in part on the guided surface wave; and
determine an accuracy of the current location based at least in part on a secondary data source.
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Abstract
Disclosed are various approaches for determining positions of a navigation unit and correcting for errors. The navigation unit can receive a guided surface wave using a guided surface wave receive structure. The navigation unit can then determine a potential location of the guided surface wave receive structure. Finally, the navigation unit can determine an accuracy of the potential location based at least in part on a secondary data source.
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Citations
20 Claims
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1. A navigation unit, comprising:
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a guided surface wave receive structure configured to obtain electrical energy from a guided surface wave traveling along a terrestrial medium, the guided surface wave having a wave front incident at a complex Brewster angle of the terrestrial medium; a processor; a memory; an application comprising machine readable instructions stored in the memory that, when executed by the processor, cause the navigation unit to at least; identify when the guided surface wave is received by the guided surface wave receive structure; determine a current location of the navigation unit based at least in part on the guided surface wave; and determine an accuracy of the current location based at least in part on a secondary data source. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A navigation unit, comprising:
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a charge terminal elevated over a lossy conducting medium; a receiver network coupled between the charge terminal and the lossy conducting medium, the receiver network having a phase delay (Φ
) that matches a wave tilt angle (Ψ
) associated with a guided surface wave, the wave tilt angle (Ψ
) based at least in part upon characteristics of the lossy conducting medium in a vicinity of a receiving structure, and the guided surface wave having a wave front incident at a complex Brewster angle of the terrestrial medium;a processor; a memory; an application comprising machine readable instructions stored in the memory that, when executed by the processor, cause the navigation unit to at least; identify when the guided surface wave is received by the receiver network; determine a current location of the navigation unit based at least in part on the guided surface wave; and determine an accuracy of the current location based at least in part on a secondary data source. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for determining a geographic location, comprising:
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receiving a guided surface wave traversing a terrestrial medium using a guided surface wave receive structure, the guided surface wave having a wave front incident at a complex Brewster angle of the terrestrial medium; determining a current location of the guided surface wave receive structure; and determining an accuracy of the current location based at least in part on a secondary data source. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification