RTK

The Boreas internal GNSS receiver supports RTK GNSS which uses correction data (RTCM messages) from a nearby base station to provide accuracy of up to 0.01 m in real time. An RTK system requires additional infrastructure equipment to generate and receive corrections data, and is not practical for all applications. Customers who require this level of accuracy but do not need it in real time should consider using Kinematica.

There are two different methods for receiving RTK corrections:

  • Network
  • Radio modem

For applications where Boreas can achieve internet access, network RTK corrections (NTRIP) are recommended.

For applications that are unable to access the internet, radio modems can be used to communicate between Boreas and the base station, see .

Note: If you do not need high accuracy positioning in real time, for example if you are planning to use Kinematica to post-process log files, an RTK system may not be necessary at all.

Network RTK Corrections (NTRIP)

NTRIP can be configured in three ways:

  1. Using the Boreas Web UI NTRIP Client in the Configuration Menu.

  2. Using the Boreas Manager application, select NTRIP Client under the Tools menu.

  3. Using the Spatial Manager for Android application. This is convenient for field testing or when temporary RTK corrections are required, for example for performance trials. Download from the Google Play store.

Any of these NTRIP clients can connect to a network RTK service to stream RTK corrections to Boreas. This requires that the client is connected to the internet, and a valid subscription with a local network RTK service. Contact Support if you need assistance in setting up for network RTK corrections.

Radio Modem RTK Corrections

 

 

Trimble R4 Base Station

Trimble TDL 450L Radio Modem

Base station radio modem RTK corrections require both a base station and a radio modem receiver. The base station is set up at a fixed location and transmits corrections to the radio modem receiver that is connected to the mobile Boreas unit (the “rover”). The radio modem receiver and Boreas unit must remain within radio range of the base station to receive these corrections. The base station should be located no more than 50 km from the Boreas, and ideally closer. Advanced Navigation recommends contacting a local surveying company for assistance setting up a base station.

Supported RTCM Messages

The internal GNSS receiver in Boreas supports receiving the following RTCM v3 messages.

Message Number
1002 1010 1045
1004 1012 MSM4
1005 1019 MSM5
1006 1020 MSM6
1007 1033 MSM7
1008 1044

Supported RTCM v3 messages