Method and apparatus for generating and using a regional-terrain model
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United States of America Patent
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Oct 30, 2012
Grant Date -
Sep 16, 2010
app pub date -
May 28, 2010
filing date -
Mar 21, 2006
priority date (Note) -
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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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