The compass calibration process configures all magnetometers on the vehicle.
Calibrate compasses on first use of the vehicle. They should not need to be calibrated again unless exposed to a very strong magnetic field, or if the vehicle is used in an area with abnormal magnetic characteristics.
Indications of a poor compass calibration include circling during hover, "toilet bowling" (spiraling-outwards at constant altitude, leading to fly-way), or veering off-path when attempting to fly straight.
Auterion Mission Control will guide you to position the vehicle in a number of set orientations and then rotate the vehicle about the specified axis.
Choose a location away from large metal objects or magnetic fields. Metal is not always obvious! Avoid calibrating on top of an office table (often contain metal bars) or next to a vehicle. Calibration can even be affected if you're standing on a slab of concrete with uneven distribution of re-bar.
The calibration steps are:
- 1.Select the Vehicle Setup view and then Sensors > Compass in the left sidebar.The Autopilot orientation should already be set correctly for the vehicle.
- 2.Click OK to start the calibration.
- 3.Place the vehicle in any of the orientations shown in red (incomplete) and hold it still. Once prompted (the orientation-image turns yellow) rotate the vehicle around the specified axis in either/both directions. Once the calibration is complete for the current orientation the associated image on the screen will turn green.
- 4.Repeat the calibration process for all vehicle orientations.
- 5.Once you've calibrated the vehicle in all the positions Mission Control will display the Compass Calibration Complete prompt (all orientation images will be displayed in green and the progress bar will fill completely).
- 6.Press OK to finish (or Reboot Vehicle if the orientation was changed).
If the drone shows symptoms of compass issues (e.g.: toilet bowling or pre-flight check error), the sensor biases can be automatically corrected simply by oscillating the drone around its 3 axes by about ±30 degrees. Two oscillations per axis are usually enough to obtain a good result.
Watch the in-field calibration in video below: