# GNSS correction source

Use the GNSS correction source tab in the Connections screen to configure the source of real-time corrections for a GNSS RTK survey.

For steps on configuring the GNSS corrections settings, see:

- To configure a rover internet data link
- To configure a base internet data link

When you start an RTK survey that uses an internet data link, the Trimble Access software automatically connects to the GNSS correction source using the settings configured in the survey style.