Method and apparatus for generating and using a regional-terrain model
First Claim
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1. An apparatus for computing position, comprising:
- a receiver operable to obtain pseudorange measurements at a location;
a terrain module operable to contain a regional-terrain model, the regional-terrain model including altitude information associated with a modeled region, wherein the modeled region defines its boundary as a function of a range of altitudes, and wherein the location is within boundary; and
a processor configured toobtain from the regional-terrain model defined by the boundary as the function of a range of altitudes, the altitude information, andcompute a position of the location as a function of the pseudorange measurements and the altitude information.
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Abstract
A method and apparatus for computing position using a regional-terrain model is provided. The method includes obtaining from at least three satellites pseudorange measurements, computing a transitional position by using a default altitude with a large uncertainty, using this transitional position to obtain from a terrain model altitude information associated with a region, and computing an accurate three-dimensional position as a function of the pseudorange measurements and the altitude information. The region defines a boundary, and the boundary includes the transitional position.
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Citations
14 Claims
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1. An apparatus for computing position, comprising:
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a receiver operable to obtain pseudorange measurements at a location; a terrain module operable to contain a regional-terrain model, the regional-terrain model including altitude information associated with a modeled region, wherein the modeled region defines its boundary as a function of a range of altitudes, and wherein the location is within boundary; and a processor configured to obtain from the regional-terrain model defined by the boundary as the function of a range of altitudes, the altitude information, and compute a position of the location as a function of the pseudorange measurements and the altitude information. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for computing position, said method comprising:
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obtaining pseudorange measurements at a location at a receiver; storing a regional-terrain model, the regional-terrain model including altitude information associated with a modeled region, wherein the modeled region defines its boundary as a function of a range of altitudes, and wherein the location is within boundary at a terrain module; and obtaining from the regional-terrain model defined by its boundary as the function of the range of altitudes, the altitude information, and computing a position of the location as a function of the pseudorange measurements and the altitude information by a controller. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification