there is some unkown reason that make my copter re-takeoff 1-2 meters before landing phase in RTL mode。
I use a sonar （TF02），and a hereflow。
within analysis the flight bin。
i found that there may some disturbence to the baro alt before landing. and throttle start to compensate for the alt loss
but i use the sonar， if there is some parameters that control the cube to use baroalt or sonar ?