VBOX 3iS / 3iSDR (INS)

This is a compact GNSS-aided Inertial Navigation System (INS) with an integrated IMU and wheel speed data from the vehicle’s CAN bus.

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

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Technical Specifications

VBOX 3iS / 3iSDR (INS)

VBOX 3iS / 3iSDR (INS) is a high-performance GNSS and inertial navigation system designed for precise vehicle motion analysis and advanced testing applications. It integrates multi-constellation GNSS with high-grade inertial sensors to deliver accurate position, velocity, and attitude data, even in GNSS-denied environments.

With high update rates and real-time data logging, it ensures reliable measurement of acceleration, braking, and dynamic vehicle behavior. Its robust design, CAN integration, and high data accuracy make it ideal for ADAS, autonomous vehicle testing, and demanding R&D environments.

Key Features

High performance 100 Hz multi-constellation GNSS receiver for accurate data capture
Reliable position and velocity in areas with poor or no GNSS coverage
Integrated high-grade IMU for precise pitch, roll, yaw, and motion data
Wheel speed data integration via CAN bus to reduce drift and improve accuracy
Compatible with steering robots for automated and repeatable testing
Ideal for multi-vehicle and multi-target ADAS testing applications
Connects easily to existing control systems or data loggers via CAN or Serial
Cost-effective solution for ADAS and vehicle dynamics testing
VBOX 3iSDR variant adds RTK and dual antenna for centimetre-level accuracy
Free lifetime support with software updates

Applications

ADAS and autonomous vehicle testing and validation
Vehicle dynamics and motion analysis
Testing in tunnels, urban canyons, and GNSS-challenged environments
Automotive research and development (R&D)
Brake, acceleration, and handling performance testing
Sensor fusion and positioning validation
Real-world driving data collection and analysis
Integration with CAN-based vehicle systems for advanced diagnostics

Accuracy	Update rate	Maximum velocity	Minimum velocity	Resolution	Latency
0.1 km/h*	100 Hz	1200 km/h	0.1 km/h	0.01 km/h	20 ms (fixed)

Accuracy	Update Rate	Resolution
0.05 % (<50 cm per km)	100 Hz	1 cm

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

Accuracy with RTK)	Accuracy with DGPS	Accuracy with SBAS	Accuracy (Standalone)	Update rate	Resolution
V: 10 mm; H: 5 mm*	V: 0.5 m; H: 0.3 m*	V: 1.2 m; H: 0.8 m	V: 1.8 m; H: 1.2 m*	100 Hz	1.8 mm *Specifications will vary depending on the number of satellites used, obstructions, satellite geometry (PDOP), multipath effects, and atmospheric conditions. For maximum system accuracy, always follow best practices for GNSS data collection.

Roll angle accuracy	Pitch angle accuracy
0.06° RMS	0.06° RMS

0.5 m Antenna Separation	1 m Antenna Separation	1.5 m Antenna Separation	2 m Antenna Separation	2.5 m Antenna Separation
<0.2° rms	<0.1° rms	<0.067° rms	<0.05° rms	<0.04° rms

Accuracy	Resolution
0.1°	0.01°

Dynamic range	Nonlinearity	Effective Resolution	Bandwidth	Noise density	Bias stability	Bias stability (ayear)
±450 °/s	0.01 % of full scale	20 bits (0.00085 °/s)	50 Hz	0.01 °/s/√Hz	0.0028 °/s	0.2 °/s

VBOX 3iS is an industry-standard GNSS-aided Inertial Navigation System that provides an efficient solution for high-accuracy ADAS and vehicle dynamics testing. It is available as the standard VBOX 3iS or the newer 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).

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.

VBOX 3iS

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

VBOX 3iSDR

100 Hz GPS/GLONASS receiver
Internal Inertial Measurement Unit
CAN bus wheel speed data integration
Pitch and roll angles with IMU integration
± 1.8 cm 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 locations

VBOX 3iS

VBOX 3iS is a highly versatile test solution. It’s high accuracy GNSS receiver combined with internal IMU and integrated wheel speed data from the vehicle’s CAN bus offers precise measurements of pitch, roll and yaw, as well as position and speed, even in areas with poor satellite signal.

The accurate measurement of attitude channels makes VBOX 3iS an ideal solution for a wide range of vehicle dynamics testing including suspension, chassis, and brake testing.

Brake & Tyre Testing

A high-resolution event marker precisely captures the start of tests and brake stops are measured at 100 Hz.

Performance Testing

VBOX 3iS is used by vehicle manufacturers for benchmarking, coastdown testing, and validating a vehicle’s performance.

VBOX 3iSDR

Building on the great features of VBOX 3iS, the VBOX 3iSDR model adds dual antennas and RTK (Real-Time Kinematic), making it ideal for ADAS testing, sensor validation, and high-accuracy vehicle dynamics testing. The 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).

ADAS Testing

It is quick and easy to test several different ADAS applications using VBOX 3iSDR, such as Adaptive Cruise Control, Autonomous Emergency Braking, Lane Departure Warning and Park Assist.

Autonomous Vehicle Testing

VBOX 3iSDR is ideal for Autonomous Vehicle testing and is compatible with most major steering robot manufacturers, offering highly accurate and repeatable path following.

Handling & Dynamics

The accurate measurement of attitude channels makes VBOX 3iSDR an ideal solution for vehicle dynamics testing including suspension, chassis, and brake testing. The two antennas add the ability to measure slip angle at five discrete locations.

Tutorials

An Introduction

This tutorial takes you through the uses and features of the VBOX 3iS.

Getting Started

This tutorial takes you through getting started with using the VBOX 3iS and its basic functionality.

The GNSS Menu

This tutorial takes you through the GNSS menu and the purpose of each of the settings within the menu.

The IMU Menu

This tutorial takes you through the IMU menu and the purpose of each of the settings within the menu.

The CAN Menu

This tutorial takes you through the CAN menu and the purpose of each of the settings within the menu

The Digital I/O Menu

This tutorial takes you through the Digital Input/Output menu and the purpose of each of the settings within the menu.

The Tests Menu

This tutorial takes you through the Tests menu and the purpose of each of the settings within the menu.

The ADAS Menu

This tutorial takes you through the ADAS menu and the purpose of each of the settings within the menu.

The Robot Mode Menu

This tutorial takes you through the Robot Mode menu and the purpose of each of the settings within the menu.

Add-ons and Accessories

VBOX NTRIP Modem

The VBOX NTRIP Modem allows a VBOX 3iSDR to receive positional correction data via Network RTK, without having to use a VBOX Base Station.

Multi-Function Touch Display

The MFD Touch is the perfect accessory to monitor one or more parameters during the test. Up to six GNSS/CAN-derived data parameters can be displayed simultaneously, and performance test results can be calculated and presented live from the vehicle.

Brake Pedal Trigger

The VBOX Brake Pedal Trigger (RLVBACS004) allows precise measurement of brake pedal application during braking. The exact time is captured and recorded by the VBOX at a high sampling rate.

DGNSS Base Station

A VBOX base station improves the position accuracy of the VBOX 3iSDR by calculating and transmitting position correction data. This accuracy allows the VBOX 3iSDR to be used as a moving target in ADAS testing or as a motion pack of a steering robot.

Antenna Mounting Pole

This mounting system (RLACS171) is used to extend antenna separation up to 2.5 m for slip angle and other dynamic testing.

Have Questions? Get in Touch

What is VBOX 3iS and where is it used?

VBOX 3iS is a compact GNSS-aided Inertial Navigation System (INS) designed for high-accuracy vehicle testing. It is widely used in ADAS validation, vehicle dynamics analysis, autonomous testing, and performance benchmarking.

What makes VBOX 3iS different from standard GNSS data loggers?

VBOX 3iS combines multi-constellation GNSS, an integrated IMU, and vehicle wheel-speed data (via CAN bus). This fusion ensures accurate and continuous data even in challenging environments like tunnels or urban areas where GNSS signals are weak or blocked.

What level of accuracy and performance does VBOX 3iS offer?

The system provides 100 Hz data output, highly accurate speed measurement (~0.1 km/h), and positional accuracy down to ~40 cm with DGNSS, with even higher accuracy achievable in RTK configurations (via 3iSDR variant).

Can VBOX 3iS be used in GNSS-denied environments?

Yes, this is one of its key strengths. The internal IMU and wheel-speed integration allow the system to maintain accurate trajectory, speed, and position during GNSS outages, ensuring uninterrupted testing in real-world scenarios.

What are the key applications of VBOX 3iS?

VBOX 3iS is ideal for:

ADAS testing (AEB, ACC, lane keeping)
Autonomous vehicle development
Vehicle dynamics and handling analysis
Brake testing and performance validation
Robotics and soft target control systems

What is VBOX 3iSDR and how is it different from VBOX 3iS?

VBOX 3iSDR is an advanced version of the VBOX 3iS, featuring dual GNSS antennas and RTK (Real-Time Kinematic) capability. This enables significantly higher positional accuracy and allows precise measurement of vehicle attitude, heading, and slip angle—critical for ADAS and vehicle dynamics testing.

What level of accuracy does VBOX 3iSDR provide?

With RTK enabled, VBOX 3iSDR delivers centimeter-level positional accuracy and highly accurate speed measurement (~0.1 km/h). It also provides ±1.8 cm brake stop accuracy, making it suitable for high-precision validation and homologation testing.

Why are dual antennas important in VBOX 3iSDR?

The dual-antenna setup allows the system to directly measure true heading and slip angle without relying solely on motion-based estimation. This improves accuracy in low-speed conditions and enhances vehicle dynamics analysis, especially for steering and stability testing.

Can VBOX 3iSDR operate in GNSS-challenged environments?

Yes. The system integrates a high-grade IMU and vehicle CAN wheel-speed data, enabling continuous and reliable data output even in tunnels, urban canyons, or areas with poor satellite visibility.

What are the key applications of VBOX 3iSDR?

VBOX 3iSDR is widely used for:

ADAS testing (AEB, ACC, lane keeping)
Autonomous vehicle validation
Vehicle dynamics and chassis development
Steering robot and guided soft target (GST) control systems