tokens: In establishing the shielding contribution to a component ’s RDM , and when 3-D physics - based Monte - Carlo analysis specified in clause 6.2.4 is used for electron - bremsstrahlung dominated environments , it shall be demonstrated that the achieved RDM includes the uncertainties ( including the level of conservatism in the shielding and the systematic and statistical errors in the calculation ) . NOTE 1 Examples of electron - bremsstrahlung dominated environments are geostationary and MEO orbits . NOTE 2 When 3-D Monte - Carlo analysis is used for ion - nucleon shielding in heavily shielded situations ( e.g. ISS and other manned missions ) greater margins are used .