Reducing bias impact on GNSS integrity
AssigneeHoneywell International Inc.
InventorsMartin Orejas, Jakub Skalicky, Jussi Raasakka
Life of this patent
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Abstract
Systems and methods for reducing bias impact on GNSS integrity are described herein. In certain embodiments, a method includes determining a phase of travel of a vehicle. The method also includes determining a probability of hazardously misleading information (PHMI) for the corresponding phase of travel. Further, the method includes determining a protection level (PL) using based on the PHMI, wherein the PL is calculated based on a standard deviation of position error plus a standard deviation of bias along an axis of interest. Additionally, the method includes comparing the protection level against an alert limit.
Claims20
A method comprising:
- determining a phase of travel of a vehicle by a processor;
- determining a probability of hazardously misleading information (PHMI) for the phase of travel by the processor;
- determining a protection level (PL) using pseudorange measurements based on the PHMI by the processor, wherein the PL is calculated based on a standard deviation of position error plus a standard deviation of bias along an axis of interest;
- and
- comparing the protection level against an alert limit by the processor.
A system comprising:
- a receiver configured to receive a plurality of signals transmitted from a plurality of transmitters;
- and
- a processor operatively coupled to the receiver, the processor configured to perform a method of integrity monitoring, wherein executable instructions cause the processor to:
- determine a phase of travel of a vehicle;
- determine a probability of hazardously misleading information associated with the phase of travel;
- and
- calculate a protection level associated with the probability of hazardously misleading information, wherein the protection level is calculated based on a standard deviation of position error plus a standard deviation of bias along an axis of interest.
A method comprising:
- receiving a plurality of pseudorange measurements from a plurality of satellites by a processor;
- calculating one or more protection levels for the plurality of pseudorange measurements by the processor, wherein the one or more protection levels are calculated based on a standard deviation of position error plus a standard deviation of bias along an axis of interest;
- and
- comparing the one or more protection levels against one or more alert limits by the processor.
Dependencies are inferred from the claim text.