I'm a little confused over the axes of the magnetometer, gyro and accelerometer, which I need in NED (Nort, East, Down) form. Empirically, I find for each sensor (0=X, 1=Y, 2=Z): magnetometer : X +ve north, Y +ve west, Z +ve down gyro : X +ve CW rotation on the X axis (roll), Y +ve CW rotation on th...