The VBOX 3iS features the latest multi-constellation, multi-frequency GNSS receiver as well as a high-grade Inertial Measurement Unit and the ability to connect directly to a vehicle's CAN bus. Combining wheel-speed data from the CAN bus with the inertial data further enhances the position and velocity measurements in areas with poor GNSS.
Ideal for testing in tunnels, urban canyons or at test tracks with heavy tree cover, the VBOX 3iS ensures the accuracy of the data being captured, even in restricted sky view conditions and can also fill gaps in GNSS coverage.
The below images are from a test that we carried out through the East India Dock Tunnel in London, which is 400 m long. Using GPS only, our position was lost as we entered the tunnel. Adding IMU and wheel-speed data into the system, the errors were significantly reduced and the vehicle was tracked through the tunnel with great accuracy, using the VBOX 3iS.