GNSS RTK (Real-Time Kinematic) technology provides highly accurate positioning through GNSS receivers, making it invaluable for fields like agriculture, surveying, construction, and any domain requiring centimeter-level precision. However, issues can occasionally emerge during RTK setup: the receiver may fail to shift from DGNSS to RTK mode, or correction signals might not be received as expected.

In this guide, we’ll walk through the main reasons behind these issues and share troubleshooting advice to help you efficiently set up your system and acquire precise data for your tasks.

1. NTRIP Server Details

Verify that the NTRIP server credentials - IP address, port, username, password, and mountpoint - are entered accurately. An incorrect mountpoint can sometimes prevent the receiver from switching to RTK mode. Additionally, check the distance between the Rover and Base station; the optimal range is typically 20-30 km. If you’re using a paid correction service, ensure your subscription is active and configured for your region. If you operate your own Base station, confirm its configuration and stable internet connection.

2. Correction Signal Quality

A reliable internet connection on the device is essential for receiving correction data from the NTRIP server. Weak or unstable connections can keep the system from reaching RTK Fixed mode. Note that network indicators like "4G" or "LTE" only show network status, not actual internet availability. To confirm connectivity, try entering a search query to check how quickly a page loads—avoid reloading previously opened pages as they might load from cached files.

For a more detailed internet check, use Speedtest, paying attention not only to download speed but also to Ping:

• Good Ping: Under 20 ms

• Average Ping: 20-50 ms

• Poor Ping: Over 50 ms

If delays are detected, consider switching to an alternate mobile network provider using a backup SIM card. Also, confirm that the receiver is receiving real-time data from the Base station with a correction age below 1 second, as delays can disrupt the RTK process.

3. RTK Receiver Configuration

Ensure your GNSS receiver settings are set to receive RTK corrections correctly. For Bluetooth connections, the receiver must send NMEA data via Bluetooth; to obtain RTK FIXED, ensure the GGA and RMC data streams are active. Refer to the receiver’s documentation for guidance on setup.

4. Antenna Positioning

Make sure your antenna is positioned in an open area with a clear view of the sky, avoiding obstructions like trees or buildings, which can impact signal quality and RTK accuracy. Ideally, place the antenna at an elevated point with no nearby metal structures that could interfere with the signal.