DGNSS RTK Base Station

Posted in Telemetry Systems


Base-StationThe RACELOGIC DGNSS RTK Base Station is designed to improve positional accuracy of VBOX units and other compatible GNSS systems by calculating and transmitting differential correction data.

By programming the Base Station with a known position, it is able to accurately monitor the difference between its known position and the position that it is calculating from GNSS satellite signals.

The difference is then transmitted via radio to allow a remote GNSS system to correct its position.

The differential correction message can be broadcasted in RTCM v2, RTCM v3, RTCM v3.2 MSM4 (VBBS6 only), RTCM v3.2 MSM7 (VBBS6 only), CMR (VBBS5 only), or proprietary RTK formats using an internal or mast mounted radio modem transmitter.

Depending on the type of roving unit used, position accuracies of up to 2 cm 95% CEP are available.



  • Survey grade multi-band receiver with either L1/L2 (VBBS5) or GPSL1/L2/L1C/L2C, GLONASS L1/L2, Galileo E1/E5a/E5b, BeiDou B1/B2 (VBBS6)
  • LCD readout for status and configuration
  • Optional integral or mast mount radio transmitters with range of up to 10 km (approx. 6.2 miles) line of sight and 2 km in built-up areas
  • Compatible with wide range of radios to suit location and range requirements
  • Up to 2 cm accuracy
  • RTCMv2, RTCMv3, CMR, RTCM v3.2 MSM4 and MSM7,or proprietary outputs (version-dependent)
  • 25-position memory to store and recall different reference locations
  • Self-survey mode
  • Up to 18hr battery life (depending on radios in use) or external power
  • Rugged IP 64 (splash proof) enclosure


The table below lists the VBOX and Base Station combinations required to achieve a specific accuracies. For a more detailed overview, including legacy products, please refer to: https://racelogic.support

Accuracy 40 - 80 cm ± 2 cm  ± 2 cm
Message Type RTCM v2 CMR
 RTCM v3.2 MSM4 
 RTCM v3.2 MSM7
Base Station BS5/ BS6 BS5/ BS6  BS6

 VBOX Data Loggers

 VBOX Mini no   no   no
 VBOX 3i yes   no   no
 VBOX 3i Dual Antenna yes   no   no
 VBOX 3i RTK (VB3iSLR) yes   yes   no
 VBOX Touch no   no   no

 VBOX Sensors

 5Hz Speed Sensors no   no   no
 10Hz | 20Hz Speed Sensors yes   no   no
 100Hz Speed Sensors yes   no   no
 100Hz Speed Sensor RTK yes   yes   no
 VBOX 3iS yes   no   no
 VBOX 3iSR yes   yes   no

 VBOX Video Loggers

 Video VBOX Pro yes   no   no
 VBOX Video HD2 yes   no   no
 Video VBOX Lite yes   no   no

yes= Compatible
no = Not compatible


Rugged Splash Proof Case



  • GNSS Antenna
    Connects to the Base Station via screw-on TNC connectors and must be placed in a position away from any other obstacles that could cause satellite signals to be blocked or reflected. Wherever possible, place the GNSS antenna and tripod (needs to be ordered separately) at the highest available spot to ensure the best un-affected satellite reception.
  • Power
    Power can be obtained either from the internal battery supply or from an external source via a front panel (using the supplied mains power supply, or via an external waterproofed connector from a suitable 8-30 V DC supply).


  • Radio Antenna
    None included. Variety of radios available depending on country and range requirements. Please see radios info sheet or contact RACELOGIC.


Front Panel Interface


  • Display
    Indicates the operating status of the Base Station.
  • RS232 Serial Interface
    Used for updating the operating firmware of the Base Station using a PC or porting to the GPS engine or radio modem for update of firmware or manual configuration changes.
  • Power
    A power input connector for charging the Base Station internal battery using the supplied mains adaptor.




  • Storage: -40°C to +50°C
  • Operating: 0°C to +45°C
  • Battery fast charge: 10°C to +50°C


  • Battery life: Up to 18hr (depending on radios)
  • Input voltage range: 8-30 Volts
  • Input current operating and ...
    charging @19V: 2.25 Amps
    not charging @19V: <0.5 Amps

95% Circle Error Probable (CEP)

  • RTCM 40cm Mode: <0.40m
  • Racelogic 20cm Mode: <0.20m
  • Racelogic 2cm Mode: <0.02m
  • CMR 2cm Mode: <0.02m

Radio Modems (more info here)

  • Frequency – Europe: 868 MHz
  • Frequency – All other countries: 915 MHz
  • Frequency – Satel: 430 MHz
  • Frequency - 2.4 GHz

Output Messages

Depending on Base station version. Please see datasheets here.


  • GPS position: 25 location