Target-Based Guidance Method for Trajectories with Multiple Flybys

IIN A real-life scenario, a spacecraft will not follow the prescribed nominal path. As a matter of fact, uncertainty in the dynamic model (e.g., gravitational parameters or radiation pressure noisy profiles) can lead to relevant drifts during ballistic arcs, while errors in command actuation (i.e., thrust magnitude and pointing angles error) can inject the spacecraft on unwanted trajectories [1]. Moreover, the spacecraft state cannot be known exactly, since it is inferred only from indirect measurements subjected to noise.