GPS receivers are heavily used in aviation for both visual and instrument flights. There is a need for a backup system so that en route and non-precision approaches can be flown without reliance on ground based systems should GPS be unavailable. This project developed a prototype which used barometric pressure, airspeed, low-cost inertial sensors, three-axis magnetometer along with high-fidelity geomagnetic models, and an optical ground speed sensor to provide backup position and navigation solutions during GPS outages and improve the GPS solution when the signal is available.


Sensors and Data

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