General structure of the DAM. Perturbing torques (solar radiation pressure, etc.) are added up and the resulting total torque is input to the equations of motion that describe the physical attitude. The AOCS estimates the attitude using dedicated sensors and then commands the thrusters in order to follow the demanded attitude. This cycle is repeated until the simulation stops. Outputs of the simulation are the physical, astrometric and on-board estimated attitudes, and the commands sent to the MPS.