Architectures for high integrity multi-constellation solution separation
First Claim
1. A method of integrity monitoring for errors in a navigation system, the method comprising:
- receiving a plurality of signals, each signal transmitted from a respective one of a plurality of space-based satellites, wherein the plurality of space-based satellites comprises at least one space-based satellite from each of a plurality of Navigation Satellite System (NSS) constellations;
determining a plurality of first sub-solutions for the navigation system in a constellation domain, wherein each respective first sub-solution of the plurality of first sub-solutions in the constellation domain is determined from a first sub-set of signals received from space-based satellites from all constellations except at least one constellation that corresponds to the respective first sub-solution;
determining a plurality of second sub-solutions for the navigation system in a satellite domain, wherein each respective second sub-solution of the plurality of second sub-solutions in the satellite domain is determined from a second sub-set of signals received from all of the plurality of space-based satellites except at least one space-based satellite that corresponds to the respective second sub-solution; and
determining if an error is present in the navigation system based, at least in part, on the plurality of first sub-solutions in the constellation domain and on the plurality of second sub-solutions in the satellite domain.
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Abstract
A method comprises receiving a plurality of signals from a plurality of space-based satellites, wherein the plurality of space-based satellites comprises at least one space-based satellite from each of a plurality of Navigation Satellite System (NSS) constellations. The method also comprises determining, in a first domain, a first plurality of sub-solutions based on a respective sub-set of the plurality of signals, each respective sub-set in the first domain chosen according to a characteristic defining the first domain; and determining, in a second domain, a second plurality of sub-solutions based on a respective sub-set of the plurality of signals, each respective sub-set in the second domain chosen according to a characteristic defining the second domain. The method further comprises determining if an error is present in the navigation system based on the first plurality of sub-solutions and on the second plurality of sub-solutions.
50 Citations
16 Claims
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1. A method of integrity monitoring for errors in a navigation system, the method comprising:
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receiving a plurality of signals, each signal transmitted from a respective one of a plurality of space-based satellites, wherein the plurality of space-based satellites comprises at least one space-based satellite from each of a plurality of Navigation Satellite System (NSS) constellations; determining a plurality of first sub-solutions for the navigation system in a constellation domain, wherein each respective first sub-solution of the plurality of first sub-solutions in the constellation domain is determined from a first sub-set of signals received from space-based satellites from all constellations except at least one constellation that corresponds to the respective first sub-solution; determining a plurality of second sub-solutions for the navigation system in a satellite domain, wherein each respective second sub-solution of the plurality of second sub-solutions in the satellite domain is determined from a second sub-set of signals received from all of the plurality of space-based satellites except at least one space-based satellite that corresponds to the respective second sub-solution; and determining if an error is present in the navigation system based, at least in part, on the plurality of first sub-solutions in the constellation domain and on the plurality of second sub-solutions in the satellite domain. - View Dependent Claims (2, 3, 4, 5)
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6. A navigation device comprising:
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a receiver configured to receive a plurality of signals transmitted from a plurality of space-based satellites in each of a plurality of Navigation Satellite System (NSS) constellations; and a processing unit operatively coupled to the receiver and configured to calculate a respective first sub-solution for each of a plurality of first sub-sets of the plurality of signals in a constellation domain, the constellation domain including signals received from space-based satellites from all constellations except at least one constellation that corresponds to the respective first sub-solution; wherein the processing unit is further configured to calculate a respective second sub-solution for each of a plurality of second sub-sets of the plurality of signals in a satellite domain, the satellite domain including signals received from all of the plurality of space-based satellites except at least one space-based satellite that corresponds to the respective second sub-solution; and wherein the processing unit is further configured to identify an error in a navigation system based, at least in part, on the first sub-solutions in the constellation domain and on the second sub-solutions in the satellite domain. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A program product comprising a non-transitory processor-readable medium on which program instructions are embodied, wherein the program instructions are configured, when executed by at least one programmable processor, to cause the at least one programmable processor to:
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calculate a respective first sub-solution for each of a plurality of first sub-sets of signals in a constellation domain that are received from a plurality of space-based satellites in each of a plurality of Navigation Satellite System (NSS) constellations, wherein each first sub-set of signals in the constellation domain is received from the plurality of space-based satellites from all constellations except at least one constellation that corresponds to the respective first sub-solution; calculate a respective second sub-solution for each of a plurality of second sub-sets of the signals in a satellite domain that are received from the plurality of space-based satellites, wherein each second sub-set of signals in the satellite domain is received from all of the plurality of space-based satellites except at least one space-based satellite that corresponds to the respective second sub-solution; and identify an error in a navigation system based, at least in part, on the respective sub-solutions in the constellation domain and on the respective sub-solutions in the satellite domain. - View Dependent Claims (13, 14, 15, 16)
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Specification