Methods and Apparatuses For GPS Coordinates Extrapolation When GPS Signals Are Not Available
First Claim
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1. A method for extrapolating Global Positioning System (GPS) coordinates when GPS signals are not available, comprising:
- using a GPS signal receiver to determine coordinates that correspond to a first location;
using the GPS signal receiver to determine coordinates that correspond to a second location;
acquiring data indicating a distance from the second location to a third location, wherein the GPS signal receiver cannot receive a GPS signal at the third location;
determining a plane that is substantially tangential to the earth'"'"'s surface at the second location; and
extrapolating on the plane, using the data indicating the distance between the second location and the third location, GPS coordinates that correspond to the third location.
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Abstract
Systems and methods for extrapolating GPS coordinates beyond line of sight are disclosed. A coordinate extrapolation system (CES) can include a memory, a processor, and a GPS receiver. The CES can receive GPS signals and determine GPS coordinates corresponding to a location. If GPS signals are unavailable, the CES models the surface of the earth and extrapolates the GPS coordinates corresponding to the location at which GPS signals are unavailable. Methods for extrapolating the GPS coordinates and calibrating the CES are also disclosed.
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20 Claims
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1. A method for extrapolating Global Positioning System (GPS) coordinates when GPS signals are not available, comprising:
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using a GPS signal receiver to determine coordinates that correspond to a first location; using the GPS signal receiver to determine coordinates that correspond to a second location; acquiring data indicating a distance from the second location to a third location, wherein the GPS signal receiver cannot receive a GPS signal at the third location; determining a plane that is substantially tangential to the earth'"'"'s surface at the second location; and extrapolating on the plane, using the data indicating the distance between the second location and the third location, GPS coordinates that correspond to the third location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A coordinates extrapolation system (CES) for determining GPS coordinates corresponding to a location at which GPS signals are unavailable, comprising:
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a processor; a GPS receiver; and a memory in communication with the processor and the GPS receiver, the memory being configured to store instructions, executable by the processor to; use a GPS signal receiver to determine coordinates that correspond to a first location; use the GPS signal receiver to determine coordinates that correspond to a second location; acquire data indicating a distance from the second location to a third location, wherein the GPS signal receiver cannot receive a GPS signal at the third location; determine a plane that is substantially tangential to the earth'"'"'s surface at the second location; and extrapolate on the plane, using the distance between the second location and the third location, GPS coordinates that correspond to the third location. - View Dependent Claims (13, 14, 15, 16)
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17. A computer readable medium comprising computer readable instructions that, when executed, perform the steps of:
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using a GPS signal receiver to determine coordinates that correspond to a first location; using the GPS signal receiver to determine coordinates that correspond to a second location; acquiring data indicating a distance from the second location to a third location, wherein the GPS signal receiver cannot receive a GPS signal at the third location; determining a plane that is substantially tangential to the earth'"'"'s surface at the second location; and extrapolating on the plane, using the distance between the second location and the third location, GPS coordinates that correspond to the third location. - View Dependent Claims (18, 19, 20)
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Specification