What is Angle of Attack?
In aerodynamics, the angle of attack simply refers to the angle between the wing and the oncoming airflow.
The system corrects a high angle of attack by pitching the plane downwards until it reaches an acceptable angle.
Originally, the data that was gathered for this metric was from a single sensor; however, in both of the crashes, the sensor fed false information to the aircraft computer causing the system to believe that the plane was in a high angle of attack even after the pitch had been corrected. This caused the plane to go into a nose-dive. Pilots unable to override the system; the aircraft plunged into an uncontrollable dive which is seen in the data gathered from the black box.
You can download the raw data that I used in my video to show the vertical speed and altitude of JT610 during its last one minute of flight from Flightradar24