Overview

Updated on Mar 4, 2026

VBOX Sigma (RLVBSIGMA) is a cost-effective, RTK enabled 10 Hz data logger with integrated NTRIP modem. Its multi-constellation, multi-frequency GNSS engine offers outstanding RTK performance even in areas with poor and multi-path satellite coverage.

When used in conjunction with an RTK Base Station or NTRIP Correction Service, VBOX Sigma is accurate to within a centimetre and is the ideal reference for ground truth.

The in-built NTRIP modem makes it easy to receive RTK correction messages from an NTRIP network, either via Wi-Fi or a 4G cellular connection. In order to use this type of correction you have to register and subscribe to a cellular data plan with your local NTRIP provider, such as Topnet in the UK and Germany, Swepos in Sweden or Unavco in the USA.
 

  • 10 Hz GNSS data logging.
  • Outstanding RTK performance.
  • Integrated NTRIP link.
  • Cost-effective PNT.
  • CAN Bus output for 3rd party connection.


More information on VBOX Sigma can be found on our website.

VBOX Sigma Small

VBOX Sigma (RLVBSIGMA) is a cost-effective, RTK enabled 10 Hz data logger with integrated NTRIP modem. Its multi-constellation, multi-frequency GNSS engine offers outstanding RTK performance even in areas with poor and multi-path satellite coverage.

When used in conjunction with an RTK Base Station or NTRIP Correction Service, VBOX Sigma is accurate to within a centimetre and is the ideal reference for ground truth.

The in-built NTRIP modem makes it easy to receive RTK correction messages from an NTRIP network, either via Wi-Fi or a 4G cellular connection. In order to use this type of correction you have to register and subscribe to a cellular data plan with your local NTRIP provider, such as Topnet in the UK and Germany, Swepos in Sweden or Unavco in the USA.
 

  • 10 Hz GNSS data logging.
  • Outstanding RTK performance.
  • Integrated NTRIP link.
  • Cost-effective PNT.
  • CAN Bus output for 3rd party connection.


More information on VBOX Sigma can be found on our website.

VBOX Sigma Small

VBOX Sigma (RLVBSIGMA) is a cost-effective, RTK enabled 10 Hz data logger with integrated NTRIP modem. Its multi-constellation, multi-frequency GNSS engine offers outstanding RTK performance even in areas with poor and multi-path satellite coverage.


When used in conjunction with an RTK base station or NTRIP correction service, VBOX Sigma is accurate to within a centimetre and is the ideal reference for ground truth.


The in-built NTRIP modem makes it easy to receive RTK correction messages from an NTRIP network, either via Wi-Fi or a 4G cellular connection. In order to use this type of correction you have to register and subscribe to a cellular data plan with your local NTRIP provider, such as Topnet in the UK and Germany, Swepos in Sweden or Unavco in the USA.

Features

  • Accuracy - When used in conjunction with an RTK base station or NTRIP correction service, VBOX Sigma is accurate to within a centimetre and is the ideal reference for ground truth.

  • Reliable GNSS Reception - Its multi-constellation, multi-frequency GNSS engine offers outstanding RTK performance even in areas with poor and multi-path satellite coverage.

  • Cost-effective - Using the latest GNSS receiver, VBOX Sigma is an incredibly cost-effective solution for reliable PNT measurement.

  • In-built NTRIP Link - The integrated NTRIP modem makes it easy to receive RTK correction messages from an NTRIP network, either via Wi-Fi or a cellular connection.

  • Data Recording - VBOX Sigma records data at 10 Hz and saved it to an SD card for data analysis.

  • CAN Bus Output - VBOX Sigma has a CAN Bus output for connection to a 3rd party data logger or another device.

  • Live Data Display - VBOX Sigma has a serial output for live data display on your PC (running VBOX Test Suite software).

  • Integration - VBOX Sigma can be used as an add-on product or built into your own solution to provide accurate ground truth. Please ask us for options to integrate.

VBOX Sigma

Features

  • Accuracy - When used in conjunction with an RTK base station or NTRIP correction service, VBOX Sigma is accurate to within a centimetre and is the ideal reference for ground truth.

  • Reliable GNSS Reception - Its multi-constellation, multi-frequency GNSS engine offers outstanding RTK performance even in areas with poor and multi-path satellite coverage.

  • Cost-effective - Using the latest GNSS receiver, VBOX Sigma is an incredibly cost-effective solution for reliable PNT measurement.

  • In-built NTRIP Link - The integrated NTRIP modem makes it easy to receive RTK correction messages from an NTRIP network, either via Wi-Fi or a cellular connection.

  • Data Recording - VBOX Sigma records data at 10 Hz and saved it to an SD card for data analysis.

  • CAN Bus Output - VBOX Sigma has a CAN Bus output for connection to a 3rd party data logger or another device.

  • Live Data Display - VBOX Sigma has a serial output for live data display on your PC (running VBOX Test Suite software).

  • Integration - VBOX Sigma can be used as an add-on product or built into your own solution to provide accurate ground truth. Please ask us for options to integrate.

VBOX Sigma
Unit Power
Input Voltage Range (automotive)7 V to 30 V DC (Hirose)5 V (USB-C)
Power Consumption<5 W
GNSS Antenna Supply
Supply Voltage3 V DC
CAN Bus
Output Data Rate125 kbit/s, 250 kbit/s, 500 kbit/s and 1 Mbit/s selectable baud rate. Software controlled CAN termination
Data availableSatellite count, time, position, speed, heading, altitude, vertical velocity, longitudinal acceleration, lateral acceleration, solution type, date, correction age, serial number
RS232
Output Data Rate10 Hz
Data availableSatellite count, time, position, speed, heading, altitude, vertical velocity, longitudinal acceleration, lateral acceleration, solution type, date, correction age

In order for some NTRIP Casters to work, they require your position. This is true if the service you are using has multiple reference stations over a large area, in which case it will need to know which one is closest to you.


This is achieved by your GNSS engine sending a GGA NMEA message to the caster, which needs to be enabled on your GNSS engine. This message can be set to transmit every 10 s, it is not necessary to send it more often than that. Note that if the NTRIP service you are using requires a GGA message, and it is not sent, you will not receive any data. If you are using your own Base Station, or a service with only one Base Station, then the GGA message is not needed.


NTRIP delivered RTCM v3 messages are usually sent once a second or once every two seconds. RTK can usually still be accurate even if the message is up to 60 s old, but for best performance, keep this as short as possible.


The VBOX Sigma GNSS engine can use the following signals:

  • GPS L1/L2C
  • Glonass L1OF, L2OF
  • Galileo E1B/C, E5b
  • Beidou B1I, B2I


Therefore it is important that the NTRIP service you use transmits all of these corrections.
 

The transmission of these correction signals at 1 Hz uses approximately 1 kB per second depending on how many satellites are visible, so if you are intending to use a SIM card to connect to the NTRIP server, ensure that you have enough data available.

So that Racelogic can continue to provide you with notification of the latest software releases, firmware upgrades and to offer technical support, please register your VBOX Sigma.

Register your unit here.

Product CodeQuantityDescription
VBSIGMA-V11VBOX Sigma Unit
RLACS3081GNSS Antenna
TTV1AM20MB311USB-A to USB-C Fast Data/Power Cable
RLCAB010H1Hirose 3 W Plug to Cigar Plug Power Cable, 2 m
8 GB SD Ultima Pro UHS-1 Memory Card1RLACS313
ANTMSTUBSMAM1Multi Band Antenna
Product CodeDescription
RLCAB1706 Way Hirose to 5 Way Lemo - 2 m
RLCAB001-H6 Way Hirose to 9 Way D-Connector - Serial cable
RLCAB1816 Way Hirose to 9 Way D-Connector - CAN cable
RLCAB1646 Way Hirose to Unterminated