Method and system for terrain aided navigation
First Claim
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1. A method for terrain aided navigation, the method comprising the steps of:
- a) providing a first vehicle state estimation from a navigational computation source;
b) correlating data from a RADAR sensor with terrain data from an on board source to provide a second vehicle state estimation;
c) integrating the first vehicle state estimation with the second vehicle state estimation; and
d) outputting an enhanced vehicle state estimation from the navigational computation source.
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Abstract
A method and system for terrain aided navigation which provide more precise and more accurate position, velocity, altitude, and attitude for an air vehicle. The present method is a continuous, active, all-weather, day/night, self-contained vehicle system used for terminal and en route navigation. The present method utilizes on-vehicle sensing elements which require no external stimulation, eliminating dependence on external ground and space-based navigation aides. The present method also provides a drift-free solution. The present method is more difficult to detect (sense) and more difficult to disrupt.
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37 Claims
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1. A method for terrain aided navigation, the method comprising the steps of:
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a) providing a first vehicle state estimation from a navigational computation source;
b) correlating data from a RADAR sensor with terrain data from an on board source to provide a second vehicle state estimation;
c) integrating the first vehicle state estimation with the second vehicle state estimation; and
d) outputting an enhanced vehicle state estimation from the navigational computation source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for terrain aided navigation comprising:
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a RADAR sensor;
an on-board source for providing terrain data;
a navigation computation source comprising a first vehicle state estimation;
a means for correlating data from the RADAR sensor with the terrain data to provide a second vehicle state estimation;
a means for integrating the first vehicle estimation with the second vehicle state estimation; and
an output from the navigation computation source comprising an enhanced vehicle state estimation. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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Specification