Fig. 4. Expansion and growth of installed lunar powe curve experience will be fully applicable to LPS production, manufacturing the tools and systems of production, decreasing the costs of logistics from Earth and to the creation of new industrial operations on the moon. Development and application of new skills by machines and people on the moon and by many more people back on Earth who can remotely direct operations on the moon will be key factors. Major programs by the Defense Advanced Research Projects Agency and by NASA in support of the proposed space station will rapidly advance automation on Earth and adapt to space these technologies of autonomous vehicles, teleoperations, robotics and remote manufacturing (4). Even construction of rectennas on Earth will be facilitated following completion of the first large transmission aperture on the moon. At Earth the beam of SPS was to be approximately 10 km in diameter. Essentially the entire rectenna had to be produced before it made sense to receive power. Otherwise an enormous flow of power would be uncollected. Interest expense accumulated during construction of the rectenna could add significantly to its final cost. LPS is different. From a 100 km aperture on the moon power could be efficiently directed into a spot only a few hundred meters across. The initial rectenna could be an efficient collector of power once it achieves that size. Thereafter, the rectenna can be added to around its periphery while it is operating. It could supply its own energy of construction and produce revenue. This means that large rectennas will be generating power and profit during most of their construction phase which will dramatically reduce interest ex-
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