It's not AoA.
It's the angle between the pitch attitutde of the aircraft and the aircraft vector, it might be close enough but it is NOT AoA.
It's not defined anywhere as far as I can see, Embraer 195.
Angle of attack is defined as the angle between the mean aerodynamic chord of the wing and the freestream airflow. NOT pitch attitude and freestream airflow. For example, you can have an aircraft with zero pitch attitude but still have a positive angle of attack.