NTRIP corrections over Ethernet

Introduction

The internal NTRIP client feature was introduced with the RT3000 v3 in 2019. It is also available on Survey+ v3, xNAV550 v3 and RT1003 products. In this article, we will cover how to configure an OxTS INS to receive NTRIP correction using a wired connection to the internet. 

Method

1. Find out the Default Gateway IP address.
   
   
2. Change the IP address of the RT3000 v3 so that it is in the same range as the gateway address:
   
   • Power up the INS and connect it to your PC via Ethernet.
   • Open NAVdisplay and connect to your INS.
   • In the 'View' menu select 'Send command bar'.
     The bar will appear at the bottom of the page. Select the device from the dropdown menu, then type the following command into the command input box :
     !CONFIG IP [ip address]
     For example, if the Default Gateway IP address is 192.168.25.1, you could use the command:
     !CONFIG IP 192.168.25.22
     where the final '22' could be the last two digits of the INS's serial number. 
   • Click on "Send".
   • The NAVdisplay template will stop updating. Launch a new template and connect to the INS at it's new IP address. 
   • Type in the following command:
     !RESET
   • Click on "Send".
     
     
3. Configure the INS settings:
   • Open NAVconfig and choose the 'Modify configuration' option.
   • Choose to 'Read settings from device' and then select your INS in the 'Device' dropdown (should display it's new IP address).
   • Navigate to Hardware Setup > GNSS Differential Corrections.
   • Tick the 'Enable NTRIP' and 'Use internal NTRIP client' checkboxes.
   • Enter the details of the NTRIP service you are using here.
   • Navigate to Advanced > Commands
   • Add the following command:
     -NTRIP_gateway[ip address]
     where [ip address] is replaced with the Gateway IP address. Using the Default Gateway IP address from the previous example, this command would be:
     -NTRIP_gateway192.168.25.1 
   • Navigate to Write Configuration and commit these changes to the INS.

Monitor NTRIP Status

After the method above has been followed, connect the INS via Ethernet to the device providing the internet connection and the INS will be configured and ready to go. The NTRIP status can be monitored in NAVdisplay:

• Go to Widgets > Digital.
• Search 'ntrip' in the search bar.
• Select the 'NTRIP status' message (will be the only result).

Here is a list of the possible values that the NTRIP status message can give and what they mean:

"NtripClientState", "NTRIP Client State"
"Invalid", "Invalid"
"Ready", "Ready to connect"
"ResolveUrl", "Resolving URL for ip"
"GetSourceTable", "Getting source table"
"ParseSourceTable", "Parsing source table"
"Authentication", "Providing authentication"
"Running", "Running"
"Close", "Triggering closing of connection"
"Closing", "Closing connection before retrying"
"Reconnecting", "Reconfiguring and reconnecting"
"Disabled", "Disabled"
"ErrUndefined", "Error, undefined"
"ErrBadAuth", "Error, bad authentication"
"ErrTcpFailed", "Error, TCP connection failed"
"ErrBadMountPoint", "Error, unrecognised mount point"
"ErrResolveUrl", "Error, unable to resolve URL"
"ErrAddress", "Error, invalid address string"
"ErrPort", "Error, invalid port number"
"Unknown", "Unknown NTRIP State"