A method for determining an estimation of an anemometric parameter of an aircraft, the anemometric parameter selected from a group comprising at least one of an angle of attack, a sideslip angle and a calibrated airspeed, the method comprising: obtaining an indication of a state of at least one secondary surface that acts on the aerodynamic coefficient of the aircraft; obtaining an indication of a position of a horizontal primary surface that act on the aircraft attitude; obtaining an estimation of the load applied on a corresponding actuator, used for actuating the horizontal primary surface of the aircraft using at least the indication of the position of the horizontal primary surface and the position of the corresponding actuator; receiving the estimation of the load applied on the corresponding actuator, the indication of the state of at least one secondary surface of the aircraft and the position of the corresponding actuator accessing at least one lookup table (212,230,236,242) with the indication of the state of the at least one secondary surface of the aircraft, the estimation of the load applied on the corresponding actuator used for actuating the horizontal primary surface of the aircraft, and the position of the corresponding actuator, the at least one lookup table (212,230,236,242) associating a given indication of the state of the at least one secondary surface of the aircraft, a given estimation of the load applied on the corresponding actuator used for actuating the horizontal primary surface of the aircraft, and a corresponding position of the corresponding actuator with a corresponding estimation of the anemometric parameter; and obtaining a corresponding estimation of the anemometric parameter of the aircraft associated with the horizontal primary surface; providing the corresponding estimation of the anemometric parameter of the aircraft associated with the horizontal primary surface; and wherein the at least one lookup table (212,230,236,242) is generated during a learning phase. obtaining an indication of a state of at least one secondary surface that acts on the aerodynamic coefficient of the aircraft; obtaining an indication of a position of a horizontal primary surface that act on the aircraft attitude; obtaining an estimation of the load applied on a corresponding actuator, used for actuating the horizontal primary surface of the aircraft using at least the indication of the position of the horizontal primary surface and the position of the corresponding actuator; receiving the estimation of the load applied on the corresponding actuator, the indication of the state of at least one secondary surface of the aircraft and the position of the corresponding actuator accessing at least one lookup table (212,230,236,242) with the indication of the state of the at least one secondary surface of the aircraft, the estimation of the load applied on the corresponding actuator used for actuating the horizontal primary surface of the aircraft, and the position of the corresponding actuator, the at least one lookup table (212,230,236,242) associating a given indication of the state of the at least one secondary surface of the aircraft, a given estimation of the load applied on the corresponding actuator used for actuating the horizontal primary surface of the aircraft, and a corresponding position of the corresponding actuator with a corresponding estimation of the anemometric parameter; and obtaining a corresponding estimation of the anemometric parameter of the aircraft associated with the horizontal primary surface; providing the corresponding estimation of the anemometric parameter of the aircraft associated with the horizontal primary surface; and wherein the at least one lookup table (212,230,236,242) is generated during a learning phase.