The Boeing Company

Gang Feng

Geun Il Kim

Susan Cheng

Tim Rohr

A method performed by an air vehicle having navigational equipment includes receiving an actual navigation performance (ANP) value from a neighboring air vehicle. The method also includes displaying a representation of the air vehicle and a representation of the neighboring air vehicle on a display. The method also includes determining a combined ANP (CANP) value based on the ANP value from the neighboring air vehicle and an ANP value of the air vehicle. The method also includes comparing a position of the air vehicle to the CANP value. The method also includes responsive to the position of the air vehicle being within a distance margin away from the neighboring air vehicle based on the CANP value, performing an action to increase a distance the air vehicle is from the neighboring vehicle.

Navigation performance in urban air vehicles

A method of indicating whether a GPS signal received by a vehicle is accurate includes obtaining the GPS signal and calculating position information of the vehicle based on the GPS signal. The method further includes obtaining position information of another vehicle via a broadcast. The method further includes calculating a first distance information to the other vehicle based on the position information of the other vehicle and the position information of the vehicle. The method further includes obtaining a second distance information to the other vehicle via a collision avoidance system on the vehicle. The method further includes comparing the first distance information to the second distance information, and generating an indicator that the vehicle and the other vehicle may have received an inaccurate GPS signal when a result of the comparison is higher than a threshold.

Systems and methods to detect GPS spoofing

A system using automatic dependent surveillance-broadcast (ADS-B) data and traffic alert and collision avoidance system (TCAS) data for determining navigation solutions for a vehicle is provided. The system has a communal position system (CPS) with a CPS sensor located in the vehicle. The CPS sensor receives ADS-B data and TCAS data from each of one or more proximate vehicles. The system further has a computer system coupled to the CPS. The computer system is configured to perform the steps of: checking the ADS-B data and the TCAS data for data reasonableness; performing data synchronization of the ADS-B data and the TCAS data; and computing a CPS position and a position accuracy based on the ADS-B data and the TCAS data. The navigation solutions include an alternate navigation solution, an independent navigation solution, and a complementary navigation solution.

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Bellevue, WA, United States of America

Gang Feng