About GNSS

Satellite constellations broadcast signals at regular intervals. These signals are received and processed by GNSS receivers.
Embedded GNSS receivers provide information about their position, velocity and the precise time at which the information was recorded.
A GNSS test campaign consists in performing tests to collect data. The quality of the results depends on the ability to exactly reproduce and repeat tests to establish and analyze statistics and make a reliable diagnostic.
First and foremost, GUIDE provides test campaigns in compliance with the ISO 17025 standard in order to assess the performance of GNSS-enabled devices.
GUIDE deploys three distinct, complementary test strategies :

  • Live testing
  • Laboratory testing using synthesised GNSS signals
  • Laboratory testing using digitalized GNSS signals recorded in the real environment


Live sky testing is often required in addition to simulation tests. Live sky testing is essential for understanding the complexity of the environments in which your GNSS-enabled devices are used.
Consequently, GUIDE has several live testing platforms to meet a wide range of transportation requirements.









A minivan is equipped to navigate city streets with perfectly plotted trajectories to serve as a benchmark. In spite of the reduced availability of satellite links and multi-paths due to urban canyons, on-board equipment accurately records the vehicle’s different positions.


  1. GNSS antenna
  2. GBOX : High accuracy recorder/ receiver
  3. IMU : Inertial Measurement Unit
  4. ODOMETER : To count the number of wheel rotations
  5. CAMERA : Identification of the environment and the spatial opening
  6. Rugged tablet PC with its software suite
  7. RTK (Real time Kinetic) reference station


  • High accuracy, integrity, and availability of measurements thanks to equipment that minimizes the errors associated with urban environments.
  • Time gains thanks to the immediate availability of a calibrated, equipped vehicle.
  • Control center to monitor tests in real-time and in particular to ensure that the desired data is properly collected.
  • Measurement security with a regulatory-standard operator seat in the back of the car.




Mobile Bag GNSS measurement


A backpack equipped with an antenna and containing a mini GBOX completes the equipment dedicated for Urban Zones. This measurement tool makes it possible to navigate in pedestrian areas and to record positions where vehicle access is impossible.

This solution is specifically designed for the smartphone market where the number of applications is fast expanding but which is characterized by highly inconsistent geo-location service quality depending on the hardware and software configurations involved.


  1. GNSS antenna
  2. Mini-GBOX : receiver/ recorder
  3. Accelerometer
  4. Camera
  5. Control tablet
  6. RTK reference station


  • Provides highly accurate measurements with light, easily transportable equipment without the considerable errors associated with urban environments









Helicopter performance GNSS


A fleet of eight GBOX equipped HELICOPTERS (8x EC120) perform altitude tests and assess the reliability of receivers during landing and takeoff.
FOR UAVs (Unmanned Aerial Vehicle), an ultra-light, mini GBOX has been specially designed to facilitate the development of dedicated GNSS receivers for this market.

Equipment :

  1. Patch antenna for rooftop installation
  2. GBOX & Mini GBOX: high accuracy receiver/recorder
  3. Rugged tablet PC with software suite
  4. RTK reference station


    1. Performance testing of GNSS receivers in a 3D scene
    2. Integrity control of navigation systems
    3. Support analyzing trajectories during critical flight phases


Boat GNSS Perfomances


A GBOX-equipped boat combined with other equipment is available to perform maritime and river testing. Communication devices specifically designed for the maritime environment have been installed on-board to improve real-time GNSS positioning.

Equipment :

  1. GNSS antenna
  2. GBOX
  3. Rugged tablet PC with software suite
  4. GNSS compass
  5. Doppler speed log
  6. River-radar
  7. Sounder
  8. Infrared camera (Night vision)


  • Performance Testing of GNSS embedded GNSS solutions
  • Support for developing AIS (Automatic Identification System) solutions
  • Testing of telecom systems using AIS – eg : Emergency beacons (SAR), T/R-AIS




The high-accuracy test platform consists of tracks fitted to the nearest millimeter and a specially designed trolley that moves on the tracks with a high degree of accuracy. A GBOX hybridized with a linear coder guarantee measurements with uncertainties less than 1cm.

Onboard equipment :

  1. GNSS antenna
  2. GBOX
  3. Linear coder
  4. Rugged tablet PC with its software suite
  5. RTK reference station


  • Performance testing of GNSS solutions – eg.: receivers, antennas, RTK, algorithms, …
  • Certification and calibration of measuring instruments
  • Implementation of a knowledge database for High-Accuracy GNSS solutions


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