tokens: For internal charging analyses , the FLUMIC V3 model [ RN.14 ] as described in Annex B.4 or , for geostationary orbits , the NASA worst case model ( Annex B.5 ) shall be used throughout the mission and the highest fluxes reported by the model used . NOTE These electron belt models are also appropriate for short - term ( from 1 day to 1 month ) worst - case cumulative radiation effect analyses .