LabSat 3 Turntable

Racelogic's complete solution for simulated dynamic moving scenarios

  • Dead reckoning simulation
  • GPS, Galileo, GLONASS & BeiDou
  • Realistic replay of driven routes
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Why use a LabSat turntable?

To cover for losses in satellite visibility, which can occur in urban canyons, tunnels and under bridges, most OEM navigation systems have a dead reckoning (DR) capability that utilises vehicle wheel speed data and turn rate information (Yaw). When it comes to testing these systems on the bench, if the dead reckoning signals are not present, the OEM navigation systems will not function correctly. To overcome this, we have developed a full navigation system testing solution comprising of a LabSat 3  GNSS simulator, Video VBOX data logger, turntable and yaw rate sensor. Wheel speed data is recorded by the LabSat 3 from vehicle CAN or wheel speed pulse.

The turntable system can use GPS, Galileo, GLONASS or BeiDou satellite constellation data to record live drive data combined with vehicle yaw rate and wheel speed information. The turntable system can work with any GNSS based dead reckoning (DR) system.

All of this data is replayed in perfect alignment so that the turntable will simulate the physical turning required to activate the DR in the navigation system under test. The wheel speed and satellite RF data will activate the navigation system and in combination with video provide a realistic replay of the driven route.

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How does the LabSat 3 Turntable work?

Firstly the LabSat 3 records the Global Navigation Satellite System (GNSS) data and then streams the previously recorded file containing satellite navigation signals back to the device under test; reproducing the navigation signals from all of the satellites which were present during the recording.

Any Satellite Based Augmentation Signals (SBAS) WAAS/EGNOS/QZSS signals present are also reproduced.

At the same time the LabSat software also replays the video, turntable and wheel speed data in sync with the satellite signal recording.

The turntable will turn to simulate the rate of turn (yaw) of the original vehicle turning. This results in a full replay of the actual route taken and will stimulate the dead reckoning (DR) system to activate.

As it is based on a real recording the data will replicate the satellite signal loss experienced in city centres and tunnels and maintain the DR solution until the signals are regained, just like the live drive. This makes the replay repeatable time and again to save you significant testing costs.

The LabSat 3 Turntable system can also simulate profiles anywhere in the world.

LabSat Turntable global solution

SatGen v3 simulation software can easily create a route and output artificial satellite RF data files.

By uploading NMEA or KML files, or by using the Google Maps interface, a complex route can be defined and recorded. When this simulated signal data is replayed the system generates the yaw rate and wheel speed data required to operate the turntable and the navigation unit being tested.

By removing the satellite data feed GNSS signal loss can easily be replicated in the navigation system whilst the DR function remains active.

Image: SatGen software showing a Google kml route file

Product Options

LabSat 3 Turntable
Record 		LabSat 3 Turntable
Replay 		LabSat 3 Turntable
Simulation
LabSat 3 (GPS, Galileo, GLONASS, BeiDou)*
SatGen software
Video VBOX video system
Racelogic IMU
Wheel Speed (CAN or Speed Pulse) Data
Turntable and Controller

*Single, dual or triple constellation systems are available.

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