The main objective of the thesis was to create a model of the propulsion system of the SROC mission in order to validate it through simulations on STK and to make the result of the simulations increasingly conform to reality. In the initial stages, an analysis was also made of all the possible choices between the technologies of the SROC propulsion system, choosing the best one through a trade-off between all of them. A series of offsets have also been added to the simulation environment that take into account the possible disturbances that the spacecraft may suffer during its operational life.