However, as you start to lose visibility of the satellites in built-up or obscured areas, the accuracy of the data typically starts to drift.īy combining wheel speed data from the vehicle's CAN bus with GNSS and Inertial data from a VBOX IMU, the VBOX 3i ADAS can maintain the accuracy of the estimated speed and position, even when you lose satellite signal. The VBOX 3i ADAS utilises wheel speed data directly from the vehicle's CAN Bus, which means you can reliably test in areas with limited or no satellite coverage, such as tunnels, deep urban canyons and test tracks with heavy tree lining.Ī 100 Hz GNSS receiver provides highly accurate measurements of position, velocity and distance in areas with a clear view of the sky.
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