In-flight loss of control, often caused by an excessive angle of attack, is the leading cause of fatal accidents in commercial aviation. Accurate monitoring of aerodynamic angles is crucial for maintaining aircraft stability, particularly during critical phases such as take-off and landing. The European Union Aviation Safety Agency (EASA) has recently considered the use of synthetic sensors as a form of analytical redundancy, reducing the need for additional hardware. The Angle of Attack and Sideslip Estimator (ASSE) was developed as a synthetic sensor to provide this redundancy by processing existing onboard data to assess aerodynamic angles, thereby eliminating the necessity for dedicated hardware when wanting to verify the correct functioning of the already existing sensors.