Low Authority GPS Aiding of Navigation System For Anti-Spoofing
AssigneeThe Boeing Company
InventorHanching Grant Wang
Life of this patent
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Abstract
A method and apparatus for generating navigation solutions. A global positioning system based navigation solution unit; an inertial navigation solution unit; a correction unit, a limiter, and an adding unit. The global positioning system based navigation solution unit is capable of generating a first navigation solution. The inertial navigation solution unit is capable of generating a second navigation solution. The correction unit is capable of generating a raw correction. The limiter is capable of selectively modifying the raw correction to fall within a selected range of corrections to form a correction. The adding unit is capable of adding the correction to the second navigation solution to form a navigation solution.
Claims11
1-10. (canceled)
A method for generating a navigation solution, the method comprising:
- generating a set of inertial navigation solution using inertial sensor measurements;
- generating a blended global positioning system and inertial navigation system navigation solution using a set of global positioning system receiver measurements and a set of inertial sensor measurements;
- computing a raw global positioning system navigation correction as the difference between inertial navigation solution and blended global positioning system and inertial navigation system navigation solution;
- storing the raw global positioning system navigation correction with a time stamp;
- retrieving the raw global positioning system navigation correction at a specified past time stamp;
- computing a low authority global positioning system correction by applying a limit upon the retrieved raw global positioning system navigation correction;
- and
- adding the inertial navigation solution and the low authority global positioning system correction to form the navigation solution.
A method for generating a navigation solution, the method comprising:
- generating an inertial navigation solution using a set of inertial sensor measurements;
- generating a blended global positioning system and inertial navigation system navigation solution using a set of global positioning system receiver measurements and the set of inertial sensor measurements;
- computing a raw global positioning system navigation correction as the difference between inertial navigation solution and blended global positioning system and inertial navigation system navigation solution;
- storing the raw global positioning system navigation correction with a time stamp;
- generating a global positioning system-only navigation solution;
- monitoring for global positioning system spoofing;
- responsive to detecting the global positioning system spoofing, retrieving a selected raw global positioning system navigation correction at a past time before the global positioning system spoofing was detected;
- computing a low authority global positioning system correction by applying a limit upon the retrieved raw global positioning system navigation correction;
- and
- adding the inertial navigation solution and the low authority global positioning system correction to form the navigation solution.
An apparatus comprising:
- a global positioning system based navigation solution unit capable of generating a first navigation solution;
- a inertial navigation solution unit capable of generating a second navigation solution;
- a correction unit capable of generating a raw correction;
- a limiter capable of selectively modifying the raw correction to fall within a selected range of corrections to form a correction;
- and
- adding unit capable of adding the correction to the second navigation solution to form a navigation solution.
Dependencies are inferred from the claim text.