RTK Base Setup
RTK-base technology provides a more accurate position estimate than the regular GPS systems onboard the X55. Its ideal accuracy can reach up to cm-level, which greatly improves the precision of flight
Last updated
RTK-base technology provides a more accurate position estimate than the regular GPS systems onboard the X55. Its ideal accuracy can reach up to cm-level, which greatly improves the precision of flight
Last updated
For more information about the RTK Base, please refer to the RTK Base documentation.
Start with the base module setup first. During the base station setup, the X55 does not need to be powered on.
Select the base module COM port in the top left corner and click “connect”.
In the SurveyIn Acc section, enter the desired absolute geographic accuracy.
In the Time column, enter the desired minimum survey time.
Click on Restart, the ground station will transfer the data you have entered to the base module, and the base module will start a new round of surveying.
You will see the following page:
During the survey process, the right box will show the current status:
The Position is invalid: The base station has not yet reached a valid location;
In Progress: The survey is still in progress；
Duration: The number of seconds that the current surveying task has been executed;
Observation: the number of observations acquired;
Current Acc: Absolute geographic accuracy that the current base station can achieve; The Green bar at the lower part of the Mission Planner page shows the current satellites being detected and the signal strength related to each satellite.
The base station needs a certain amount of time to meet the accuracy requirements of your input. (For 2m accuracy, it usually takes a few minutes; to reach the absolute accuracy of less than 30cm, it takes around an hour; to reach the accuracy of 10cm, it takes a few hours).
It should be noted that the absolute geographic accuracy of the base station here will affect the absolute geographic accuracy of the rover module without affecting the relative accuracy between the base station and the rover. If the application does not require the X55 with high absolute geographic accuracy.
It is recommended to set the base station’s precision lower to reduce the survey time. Even if the accuracy of the base station is 1.5 to 2 m, the position accuracy of the rover module relative to the base station can still reach the centimeter level.
After the survey is completed, Mission Planner will display the following page: In the RTCM box, it shows that the base status indicator is green and both the GPS and Glonass satellite systems are green. The box on the right says "Position is valid". The base station setup is completed.
To store the current location, click “Save Current Pos” and enter the name in the dialog box, and click “OK”. In the future, if you set the base station at the same location, you do not need to conduct the survey again. Just click the “Use” button that corresponds to the location you saved.
After the base station is set up, you can turn on the X55.
Using the same telemetry module to connect Mission Planner, the base station data will be transmitted through the telemetry module to the Here3 rover module on the UAV.
On the Mission Planner main page, you can see the current GPS status displayed as RTK Float / RTK Fixed / 3D RTK, indicating that the positioning of the UAV has entered the RTK mode.
RTK Float is a floating-point solution; RTK Fixed is a fixed solution. RTK Fixed mode has higher accuracy and requires better signal strength.
Setup completed.
