Calibrating the compass

Every time the DJI Air 2S TOPODRONE PPK changes location, it needs to calibrate the compass. 

Compass calibration allows the drone's flight controller to calibrate along local magnetic field lines according to current deviations and interference. The compass calibration mode is activated before takeoff on the ground using the remote control or flight software. During compass calibration, the accelerometer and compass must be rotated 380 degrees twice on two different axes. After that, the drone corrects the readings of both sensors. It is strongly recommended to calibrate the compass before each first flight in a new area, when moving to a new point, changing the location even for 1 km and after the drone is idle.

A map of anomalous deviations of the Earth's magnetic field on the example of the of the Moscow region territory.

 To calibrate the compass correctly, you need to follow these steps: 

1. Compass calibration is performed immediately before flying in an open area (It is pointless to calibrate indoors).
2. Turn on the drone and remote controller, connect your mobile device. 
3. Make sure that there are no large metal structures and sources of magnetic fields (power lines, hangars, transformers, garages, bridges, etc.) within a radius of 50 m.
4. Switch the drone to compass calibration mode. This can be done in two ways:

                 a) In the DJI Fly app, select the tab Safety/Sensors/Compass Working/Calibrate/Start.

                 b)  In the middle of the remote, quickly move the switch to the C position, then the S position at least four times.

Fast switching of the flight mode lever 4 times or more leads to the drone switching to the compass calibration mode.