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“Tunnel Guide” Feature for GPS-Aided INS Improves Performance During GNSS Outage
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“Tunnel Guide” Feature for GPS-Aided INS Improves Performance During GNSS Outage - 1

“Tunnel Guide” Feature for GPS-Aided INS Improves Performance During GNSS Outag

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“Tunnel Guide” Feature for GPS-Aided INS Improves Performance During GNSS Outage - 2

For years Inertial Labs has produced high accuracy Inertial Navigation Systems (INS) at the world's best price-performance ratio. An INS estimates the position, attitude, and velocity using the gyroscopes and accelerometers contained inside an inertial measurement unit (IMU). Position accuracy can be greatly improved when the INS is aided by Global Navigation Satellite System (GNSS). However, GNSS is not always available. Customer requirements demand for better performance of an INS during GNSS outage. Outages can be caused by tunnels, urban canyons, roads under bridges, etc. During GNSS...

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“Tunnel Guide” Feature for GPS-Aided INS Improves Performance During GNSS Outage - 3

The average drift rate of the second sample set was calculated to be 0.2% DT over the course of the 30-minute outage with a peak drift of approximately 45 meters. These results show that Tunnel Guide significantly improves performance accuracy during GNSS outages, at a much lower cost. In addition, if the vehicle does have a DMI - be it an external wheel sensor or a sensor provided by the vehicle itself via its digital bus* - using this instrument, automatically calibrated by Tunnel Guide algorithm, will further improve the INS accuracy, bringing the position error down to 0.05% DT or...

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“Tunnel Guide” Feature for GPS-Aided INS Improves Performance During GNSS Outage - 4

About Inertial Labs Inc. Established in 2001, Inertial Labs is a leader in position and orientation technologies for commercial, industrial, aerospace and defense applications. Inertial Labs has a worldwide distributor and representative network covering 20+ countries across 6 continents and a standard product line spanning from Inertial Measurement Units (IMU) to GPS-Aided Inertial Navigation Systems (INS). With application breadth on Land, Air, and Sea; Inertial Labs covers the gambit of inertial technologies and solutions. Inertial Labs, Inc. 39959 Catoctin Ridge Street, Paeonian...

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