Table 4.3 Issue Priorities highest priority second highest priority third highest priority space transportation reduction of ETO launch costs •design towards improved maintainability and operability •aircraft -type operations •improve materials and propulsion systems •develop more efficient OTV propulsion systems develop environmentally safe propulsion systems minimize space debris spacecraft attitude and orbit control of large structures efficient radiator systems large structure resonance control large capacity power storage high pointing accuracy (beams/antenna) maintainability over long term large deployable structure technology power collection conversion and distribution development of more efficient power conversion system (phased array, efficient high- frequency, high-power transmitter, etc) development of more efficient power collection system (photovoltaic or solar dynamics) development of efficient and affordable beam collection system improvement in lifetime of collection system environment and life sciences determination of beam effects on biota (including study of different frequencies on biota) determination of beam effects on atmosphere of Earth determination of effects of increased number of launches on atmosphere and biota determination of interference of beam (including harmonics / sidebands) on existing and future users determination of rectenna construction and operation effects on environment (habitat destruction, waste heat, etc.) development of in- orbit/lunar crew habitation and medical facilities development of safe large- scale space construction methods (EVA suit, robotics etc.) sociopolitical creation of an international group to manage a space solar power project insure security of satellite and beam (accuracy pointing, remove terrorist threat) obtainability of desired frequency from ITU creation of international consensus on the beneficial aspects of space solar power project manufacturing and assembly development of advanced assembly techniques (robotics/program/EVA) extraterrestrial resources processing and transportation techniques development of advanced vibration controlled technique during assembly phase development of a lunar resource utilization program development of space manufacturing using space power satellite power understanding of the choice of subassembly size (EVA/EVR versus number of launches) other achieve business feasibility for program obtain reliable long-term funding sources achieve scientific acceptance public awareness public acceptance development of effective plan to get a reliable share of the energy market improvement of the standard of living (overalll population)
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