- rotation = new AltosRotation(AltosIMU.convert_accel(accel_ground_across - cal_data().accel_zero_across),
- AltosIMU.convert_accel(accel_ground_through - cal_data().accel_zero_through),
- AltosIMU.convert_accel(accel_ground_along - cal_data().accel_zero_along),