Accelerometer calibration

Calibrate the accelerometer on first use of the vehicle or if the flight controller orientation is changed. Otherwise re-calibration should not be required (except perhaps in winter, if using a flight controller that was not thermally calibrated in the factory).

Auterion Mission Control will guide you to place and hold your vehicle in a number of orientations (you will be prompted when to move between positions). The process is the same as compass calibration except the vehicle is held still in each orientation (rather than rotated).

The calibration uses a least squares 'fit' algorithm that doesn't require "perfect" 90 degree orientations. Provided each axis is pointed mostly up and down at some time in the calibration sequence, and the vehicle is held stationary, the precise orientation doesn't matter.

Poor accelerometer calibration is generally caught by preflight checks and arming-denied messages (warnings typically refer to "high accelerometer bias" and "consistency check failures").

The calibration steps are:

  1. Select Vehicle Overview > Sensors > Accelerometer in the left sidebar.

    Check that the Autopilot orientation is correctly set for the vehicle.

  1. Click OK to start the calibration.

  2. Position the vehicle as guided by the images on the screen. Once prompted (the orientation-image turns yellow) hold the vehicle still. Once the calibration is complete for the current orientation the associated image on the screen will turn green.

  3. Repeat the calibration process for all vehicle orientations.

  4. Once the vehicle is calibrated Mission Control will display Calibration complete (all orientation images will be displayed in green and the progress bar will fill completely).

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