Fig. 16. Panel installation. Fig. 17. Two-stage, parallel bum HLLV concept. The ground rectenna varies in area as a function of the latitude on the earth where it is located. Nominally, an elliptic area 10 km by 13 km, corresponding to a rectenna location at 34° in latitude, has been selected for system evaluations. The rectenna area contains 1088 rows of rectenna panels which are typically tilted 40 degrees from the horizontal at a 34° N latitude. A typical rectenna panel system and its supports are shown in Fig. 16. The panel is comprised of rectenna modules that are phased arrays of bow-tie dipoles connected by a stripline. Transportation systems The transportation effort resulted in definition of a heavy life launch vehicle (HLLV) to transport cargo from earth to low earth orbit (LEO), an electric orbit transfer vehicle (EOTV) for cargo transportation from LEO to geosynchronous equatorial orbit (GEO), and a personnel orbit transfer vehicle (POTV) for transfer of personnel between LEO and GEO. A rocket-propelled HLLV, shown in Fig. 17, has been given primary attention in this study. This concept is a parallel bum concept which has cross-feed of LO2 and LH2 propellants from the first stage to second stage from launch through staging.
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