Track fusion using SIGINT or estimated speed
First Claim
1. A method comprising:
- receiving data indicating a first actual Time of Arrival (ToA) of a first SIGnal INTelligence (SIGINT) signal at a collector;
receiving data indicating a second actual ToA of a second SIGINT signal at the collector, the second actual ToA after the first actual ToA, the first and second SIGINT signals originating from the same emitter;
estimating a first location and a first covariance of the first SIGINT signal, the first covariance defining a confidence interval associated with the first SIGINT signal originating from the first location;
generating a first bounding area based on the first covariance and the first location, the bounding area indicating a region in which the first SIGINT signal originated;
estimating a second location and second covariance of the second SIGINT signal, the second covariance defining a confidence interval associated with the second SIGINT signal originating from the second location;
calculating a plurality of residual errors, each residual error calculated based on the first and second locations and the first and second estimated ToAs;
determining track fragments that are within the first bounding area so as to define which tracks are in a first plurality of track fragments;
estimating a first set of estimated ToAs of the first SIGINT signal at a collector, each of the first set of estimated ToAs based on a different track fragment of the first plurality of track fragments active at the first time;
estimating a second set of estimated ToAs of the second SIGINT signal at the collector, each of the second set of estimated ToAs based on a different track fragment of a second plurality of track fragments active at the second time; and
matching a track fragment of the first plurality of track fragments with a track fragment of the second plurality of track fragments based on the first and second sets of estimated ToAs, the first and second actual ToAs, and the residual errors.
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Accused Products
Abstract
Generally discussed herein are systems and apparatuses that are configured to and techniques for matching track fragments. According to an example, a technique can include receiving data indicating a first and second actual ToA of first and second SIGINT signals at a collector, estimating first and second sets of estimated ToAs of the first and second SIGINT signals at a collector, respectively, each of the first and second sets of estimated ToAs based on a different track fragment of a first plurality of track fragments active at the first time and a different track fragment of a second plurality of track fragments active at the second time, respectively, or matching a track fragment of the first plurality of track fragments with a track fragment of the second plurality of track fragments based on the first and second sets of estimated ToAs and the first and second actual ToAs.
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Citations
14 Claims
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1. A method comprising:
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receiving data indicating a first actual Time of Arrival (ToA) of a first SIGnal INTelligence (SIGINT) signal at a collector; receiving data indicating a second actual ToA of a second SIGINT signal at the collector, the second actual ToA after the first actual ToA, the first and second SIGINT signals originating from the same emitter; estimating a first location and a first covariance of the first SIGINT signal, the first covariance defining a confidence interval associated with the first SIGINT signal originating from the first location; generating a first bounding area based on the first covariance and the first location, the bounding area indicating a region in which the first SIGINT signal originated; estimating a second location and second covariance of the second SIGINT signal, the second covariance defining a confidence interval associated with the second SIGINT signal originating from the second location; calculating a plurality of residual errors, each residual error calculated based on the first and second locations and the first and second estimated ToAs; determining track fragments that are within the first bounding area so as to define which tracks are in a first plurality of track fragments; estimating a first set of estimated ToAs of the first SIGINT signal at a collector, each of the first set of estimated ToAs based on a different track fragment of the first plurality of track fragments active at the first time; estimating a second set of estimated ToAs of the second SIGINT signal at the collector, each of the second set of estimated ToAs based on a different track fragment of a second plurality of track fragments active at the second time; and matching a track fragment of the first plurality of track fragments with a track fragment of the second plurality of track fragments based on the first and second sets of estimated ToAs, the first and second actual ToAs, and the residual errors. - View Dependent Claims (2, 3, 4, 5)
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6. A non-transitory computer readable storage device comprising instructions stored thereon, the instructions, which when executed by a machine, cause the machine to perform operations comprising:
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receiving data indicating a first actual Time of Arrival (ToA) of a first SIGnal INTelligence (SIGINT) signal at a collector; receiving data indicating a second actual ToA of a second SIGINT signal at the collector, the second actual ToA after the first actual ToA, the first and second SIGINT signals originating from the same emitter; estimating a first location and a first covariance of the first SIGINT signal, the first covariance defining a confidence interval associated with the first SIGINT signal originating from the first location; generating a first bounding area based on the first covariance and the first location, the bounding area indicating a region in which the first SIGINT signal originated; estimating a second location and second covariance of the second SIGINT signal, the second covariance defining a confidence interval associated with the second SIGINT signal originating from the second location; calculating a plurality of residual errors, each residual error calculated based on the first and second locations and the first and second estimated ToAs; determining track fragments that are within the first bounding area so as to define which tracks are in a first plurality of track fragments; estimating a first set of estimated ToAs of the first SIGINT signal at a collector, each of the first set of estimated ToAs based on a different track fragment of the first plurality of track fragments active at the first time; estimating a second set of estimated ToAs of the second SIGINT signal at the collector, each of the second set of estimated ToAs based on a different track fragment of a second plurality of track fragments active at the second time; and matching a track fragment of the first plurality of track fragments with a track fragment of the second plurality of track fragments based on the first and second sets of estimated ToAs, the first and second actual ToAs, and the residual errors. - View Dependent Claims (7, 8, 9)
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10. An apparatus comprising a processor configured to:
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receive data indicating a first actual Time of Arrival (ToA) of a first SIGnal INTelligence (SIGINT) signal at a collector; receive data indicating a second actual ToA of a second SIGINT signal at the collector, the second actual ToA after the first actual ToA, the first and second SIGINT signals originating from the same emitter; estimate a first location and a first covariance of the first SIGINT signal, the first covariance defining a confidence interval associated with the first SIGINT signal originating from the first location; generate a first bounding area based on the first covariance, the bounding area indicating a region in which the first SIGINT signal originated; estimate a second location and second covariance of the second SIGINT signal, the second covariance defining a confidence interval associated with the second SIGINT signal originating from the second location; calculate a plurality of residual errors, each residual error calculated based on the first and second locations and the first and second estimated ToAs; determine track fragments that are within the first bounding area so as to define which tracks are in the first plurality of track fragments; estimate a first set of estimated ToAs of the first SIGINT signal at a collector, each of the first set of estimated ToAs based on a different track fragment of the first plurality of track fragments active at the first time; estimate a second set of estimated ToAs of the second SIGINT signal at the collector, each of the second set of estimated ToAs based on a different track fragment of a second plurality of track fragments active at the second time; and match a track fragment of the first plurality of track fragments with a track fragment of the second plurality of track fragments based on the first and second sets of estimated ToAs, the first and second actual ToAs, and the residual errors. - View Dependent Claims (11, 12, 13, 14)
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Specification