Patent ID: 7105790

Claim:
A process used in a computation device of a spinning projectile to control the trajectory of the spinning projectile and an inertial unit in the spinning projectile measures the projectile's accelerations in three axes within a reference linked to the projectile so as to prepare the piloting commands for the projectile's trajectory, wherein: measuring the velocity vector V components (V X , V Y , V Z ) of the projectile using a global positioning system (GPS) along three axes and within a land reference (G X , G Y , G Z ) evaluating based on the velocity vector component measurements, the components (Γ X ,Γ Y ,Γ Z ) of the acceleration vector Γ in the same land reference (GX, GY, GZ); and recalculating, at each of the measurements and periodic evaluations by the GPS, the Euler angles of the projectile by combining the resultants of the velocity (V) and acceleration (Γ) measurements given by the GPS and those of the acceleration given by the inertial unit in order to adjust a piloting device of the spinning projectile.