should provide a sufficient radiation shielding. However, a more detailed study on this subject has to be carried out during the concept development phase. Electromagnetic Interference and Compatibility The transmission frequency of 2.45 GHz has been reserved for industrial use. Therefore there should be no interference problem with existing telecommunication links. A first assessment has identified a potential filtering problem in the Mir-Progress docking system. It could be solved using a pulsed power transmission to be triggered by the docking system. However in the concept development phase, all Mir and Progress subsystems have to be examined systematically to ensure that there is no harmfill impact of the power beaming experiment. 10.2.4 System Budgets and Scheduling The system budgets presented in this section describe the overall power budget of the beaming experiment, the mass estimates for the experiment hardware, a cost estimate and a preliminary schedule to realize the project. Power Budget Figure 10.2.14 shows the power budget for the beaming experiment in a worst case estimate. The conversion and beaming efficiencies are discussed in detail in the section on power beaming. Figure 10.2.14 Power Budget Mass Budget and Schedule The masses of the phased array and the rectenna have been estimated using the technology value of 22 kg/m2 (including power amplifiers and phase shifters) of the Matra Marconi Advanced SAR antenna. In case of the transmitting antenna a factor of 1.75 has been applied to take into account the down scaling effects (structural parts with non-scalable weight) as well as the higher thermal loads on the array. Since the rectenna is much less complex in technology and structure, the value of 22 kg/m2 has been adjusted by a factor of 0.75. The relatively high mass margin of 25% represents the high uncertainty level of this estimate due to the small amount of available reference data. The scientific equipment has not been considered in this mass budget.
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