The complexity of space missions based on small satellite platforms is continuously growing. Consequently, the related technologies used in those spacecrafts are also getting more and more complex and sought-after. Among these, the Attitude and Orbit Control System (AOCS) is one of the most critical subsystems. AOCS is responsible, in part, for achieving mission objectives. For this reason, much attention is paid to its design and improvement. Today, the trend is towards making these systems increasingly reliable and high performing. Achieving this last point requires high fidelity models of the spacecraft dynamics and disturbances, that it will undergo, to be used when synthesizing attitude control algorithms.