Compact GNSS-aided Inertial Navigation System (INS) with integrated IMU and wheel speed data from the vehicle’s CAN bus

  • Reliable position & velocity in areas with poor GNSS
  • Connects to your existing control system or data logger
  • Ideal for multi-vehicle, multi-target ADAS testing
  • Compatible with steering robots
  • VBOX 3iSDR model adds RTK and dual antenna

VBOX 3iS is the industry standard GNSS-aided Inertial Navigation system, offering an efficient solution for high-accuracy ADAS and vehicle dynamics testing – available as the standard VBOX 3iS or the new VBOX 3iSDR.

Featuring the latest multi-constellation, multi-frequency GNSS receiver, VBOX 3iS delivers robust location and position data. Accuracy is further enhanced by the internal high-grade Inertial Measurement Unit (IMU) which smoothly fills any gaps in GNSS reception for short periods of time. For longer periods of occlusion, VBOX 3iS utilises the wheel speed data from the vehicle’s CAN bus to significantly reduce any drift.

VBOX 3iSDR builds on the great features of the VBOX 3iS and adds a dual antenna and RTK (Real-Time Kinematic).

Key Features

High Performance GNSS Receiver

The 100 Hz multi-constellation, multi-frequency GNSS engine tracks both the GPS and GLONASS networks of satellites and ensures that data is accurately captured, even in restricted sky view conditions.

Reliable in Poor GNSS Conditions

In GNSS denied environments, such as tunnels and deep urban canyons, VBOX 3iS significantly improves the accuracy of the estimated speed and position data by combining wheel speed information with GNSS and inertial data.

Compatible with Steering Robots

RTK accuracy combined with the IMU makes VBOX 3iSDR a versatile Motion Pack, providing the speed, position and attitude data required to control driving robots and guided soft targets (GST).

Cost-effective ADAS Testing Solutions

VBOX 3iSDR is highly effective for use in multi-target ADAS testing, such as swarm testing, where an accurate data source is essential for each target vehicle but does not require individual logging capabilities.

High-grade IMU

The internal high-grade IMU offers precise measurements of pitch, roll and yaw and helps fill GNSS gaps for short periods of time caused by obstructions such as heavy tree cover or bridges.

Wheel Speed Integration

Wheel speed data from the vehicle’s CAN bus is used to significantly reduce any drift in the data and stabilise the accuracy of speed and position without fitting expensive external wheel speed sensors.

Extremely Versatile

VBOX 3iS is designed to be used with your existing control system or data logger and connects via Serial or CAN.

Compact Solution

The small size of VBOX 3iS makes it ideal for simple installation on target platforms and GST’s where space is at a premium.

Which VBOX 3iS is right for you?

Both variants of VBOX 3iS offer a 100 Hz update rate, use the very latest GNSS technology and include an integrated IMU and wheel speed CAN bus connection. However, you have a choice whether you require the standard VBOX 3iS with single antenna or the VBOX 3iSDR with dual antennas and RTK.


  • 100 Hz GPS/GLONASS receiver
  • Internal Inertial Measurement Unit
  • CAN bus wheel speed data integration
  • Pitch and roll angles with IMU integration
  • ± 1.8 m Brake stop accuracy
  • RS232/ CAN bus
  • 1.8 m position accuracy (using SBAS)


  • 100 Hz GPS/GLONASS receiver
  • Internal Inertial Measurement Unit
  • CAN bus wheel speed data integration
  • Pitch and roll angles with IMU integration
  • ± 1.8 m Brake stop accuracy
  • RS232/ CAN bus/ Ethernet
  • <1 cm position accuracy with RTK
  • Motion Pack for driving robots & guided soft targets (GST)
  • Dual antenna for slip angle measurement at 5 points


VBOX 3iS is an extremely cost-effective solution for ADAS validation, steering robots and autonomous vehicle testing, and can also be used for conducting performance, braking and benchmarking tests. It has an oversampled event marker to precisely capture the start of tests such as braking.

In areas with limited or no satellite signal (such as tunnels or test tracks surrounded by trees), the VBOX 3iS can fill in the gaps for prolonged periods of time – allowing you to continue testing without having to worry about erroneous data.

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This video shows onboard footage from a car equipped with a VBOX 3iS driving through a multi-storey car park. You can see on the real-time graphic overlay that we are able to achieve sub 50 cm accuracy throughout the car park.
This VBOX 3iS product feature was published in the Automotive Testing Magazine International magazine in March 2019. Read the article here.

Technical Specifications

GNSS Specifications

Absolute Positioning

  • Accuracy Standalone*: V: 3 m, H: 6 m
  • Accuracy with SBAS*: <1.8 m
  • Accuracy with RTCM DGNSS*: V: 0.4 m, H: 2 m
  • Accuracy with RTK*: 0.02 m
  • Update rate: 100 Hz

 *95% CEP (Circle of Error Probable). 95% of the time the position readings will fall within a circle of the stated radius.


  • Accuracy: 0.1 km/h (averaged over 4 samples)
  • Update rate: 100 Hz
  • Maximum velocity: 655 knots (1200 km/h)
  • Minimum velocity: 0.1 km/h
  • Resolution: 0.01 knots (0.0185 km/h)
  • Latency: 15.5 ms


  • Accuracy: 0.50 %
  • Maximum: 20 g
  • Resolution: 0.01 g
  • Update rate: 100 Hz


  • Accuracy: 0.05 % (<50 cm per km)
  • Update rate: 100 Hz
  • Resolution: 0.078 mm


  • Resolution: 0.01°
  • Update rate: 100 Hz


  • Resolution: 0.01 s
  • Accuracy: 30 ns

Brake Stop Accuracy

  • Accuracy: ± 1.8 cm
    (based on <50 m brake stop distance)

Roll & Pitch Angle Accuracy

  • Pitch Angle: 0.06° RMS
  • Roll Angle: 0.06° RMS

IMU Specifications

Gyroscopes (Angular rate sensors)*

  • Dynamic range: ±450°/s
  • Nonlinearity: 0.01% FS
  • Resolution: 16 bit ADC (0.014°/s)
  • Bandwidth: 50 Hz
  • Noise density: 0.01 °/s/√Hz
  • Bias stability: ±0.003 °/s
  • Bias repeatability (1 year): 0.2 °/s


  • Dynamic range: ±20 g
  • Nonlinearity: 0.1 % FS
  • Resolution: 16 bit ADC (0.15 mg)
  • Bandwidth: 50 Hz
  • Noise density: 60 µg/√Hz
  • Bias stability: 15 µg
  • Bias repeatability (1 year): 0.005 g
*Inertial measurement sensors are highly sensitive mechanical systems. Their performance and life span can be impacted by severe vibration or heavy knocks, and we can only guarantee the gyroscope and accelerometer specifications for a maximum of 2 years from the date of purchase.