Root Cause:

RTCM data is transmitted to the flight controller.
After the flight controller processes and calculates the coordinates, it sends the latitude/longitude information to the main antenna.

• ​Data Transmission Path:
  1. Aircraft obtains ground RTCM data → transmits via telemetry link to flight controller → flight controller forwards to main antenna (delay may occur in this chain).
  2. Aircraft acquires network RTCM data → transmits through 4G antenna to domain controller → ​domain controller relays to co-controller → finally reaches main antenna.

​Troubleshooting Steps:

​1. For network RTK positioning:

• Check SIM card status.
• Inspect 4G antenna connectivity.

2. For ground RTK positioning:Verify network connectivity on the remote controller.

​3. For ground station positioning:

• Confirm ground station functionality.

​4. If issues persist:Replace positioning module (calibrate magnetometer).