This paper proposes a rapid attitude trajectory generation method for satellite reorientation, which is suitable forboth rest-to-rest and track-to-track maneuvers. The problem is first formulated and solved using academic softwarereadily used for generating optimal guidance trajectories offline. Then, the problem is reformulated using a Bezierpolynomial parametrization of the quaternion trajectory, which naturally satisfies the unit quaternion normconstraint. The parameters of the quaternion trajectory polynomial and of the speed profile are varied to arrive at aquasi-optimal solution that is both feasible and exactly matches the endpoint conditions specified in the problem. Thereduction in the number of varied parameters due to the predetermined structure of the trajectory leads to a fastcomputational speed as well as a solution that satisfies the end constraints at each iteration. The paper includesnumerical simulation results obtained for several cases.
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