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Systems and methods for solution separation for ground-augmented multi-constellation terminal area navigation and precision approach guidance

  • US 8,976,064 B2
  • Filed: 09/06/2012
  • Issued: 03/10/2015
  • Est. Priority Date: 09/06/2012
  • Status: Active Grant
First Claim
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1. A navigation system for a mobile object, comprising:

  • a first receiver configured for reception of satellite signals from a plurality of satellites;

    a second receiver configured for reception of differential correction data from a plurality of blocks of ground receivers;

    at least one processing device communicatively coupled to the first receiver and the second receiver;

    wherein the at least one processing device is configured to determine correction data for each of the satellite signals from the plurality of satellites based on the differential correction data received through the second receiver from the plurality of blocks of ground receivers;

    wherein the at least one processing device is configured to determine a position solution for the mobile object based on the satellite signals received from the plurality of satellites and corresponding differential correction data received through the second receiver from the plurality of blocks of ground receivers;

    wherein the at least one processing device is configured to determine a plurality of first position sub-solutions for the mobile object based on satellite signals from all but one single satellite of the plurality of satellites, the one single satellite different for each of the plurality of first position sub-solutions, and corresponding differential correction data from the plurality of blocks of ground receivers;

    wherein the at least one processing device is configured to calculate first separations as a function of first differences between the position solution and the first position sub-solutions, the first separations providing first indications of any faults degrading the accuracy of the position solution;

    wherein the at least one processing device is configured to determine second position sub-solutions for the mobile object based on the satellite signals received from the plurality of satellites and corresponding differential correction data from all but one single block of ground receivers of the plurality of blocks of ground receivers, the single block of ground receivers different for each of the plurality of second position sub-solutions;

    wherein the at least one processing device is configured to calculate second separations as a function of second differences between the position solution and the second position sub-solutions, the second separations providing second indications of any faults degrading the accuracy of the position solution; and

    wherein the at least one processing device is configured to detect an error in the position solution when at least one of the first separations or the second separations exceed a corresponding separation limit.

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