Heat rejection for the WPT transmitter is assumed to be both modular and integrated at the ‘back-plane’ of the transmitter array. Power transmission lines from the single, central tether attachment point to the back-plane are assumed to be integrated with the modular sub-assemblies of the array. Figure 3-4 The MEO SunTower Concept Architectural Context In-Space Infrastructure. No unique in-space infrastructure is required for initial SunTower deployment, which takes place in LEO. However, it is assumed that the launched systems include modular assemblysupport systems. These might consist of a clever mechanical scheme inherent in the structure, or a more sophisticated and mobile, self-contained robotics approach - for example, ‘spiders’. After initial growth, the system translates to a market-targeted MEO orbit, a low-cost (possibly space-based) orbital transfer vehicle will be required to transport system elements from the HRST delivery point in LEO to that operational orbit. SunTower: Ground Segment. The nominal ground receiver for the Sun Tower concept is a planar rectenna approximately 2.0 to 4.5 km diameter (for the LEO-SS and MEO systems respecively) with direct electrical feed into the commercial power utilities interface. The space segment is consistent with a variety of ground segment approaches; however during the early years of operations, multiple ground stations (perhaps on order 25 for a MEO system and substantially more for a LEO-SS system) would be
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