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Inertial Labs has worked for years to develop a robust navigation solution that works well during a GNSS outage.

Inertial Labs developed the Tunnel Guide feature for the GPS-Aided INS: an advanced algorithm that implements continuous dynamic modeling for land vehicle motion. As a result, the INS is able to mitigate error and increase accuracy of its MEMS IMU during prolonged GNSS outage. Now the position error of a land vehicle remains low even in a GNSS outage area such as: a tunnel; a city with signal blocking buildings; or any area where satellite communication is blocked.