The curve we generated by the estimated parameter graphs shows an electricity demand of approximately 5000 TWh/year for 2025. This is our reference figure for the following sections of part II of this study. II.3 ORBITAL LIMITATIONS FOR EUROPEAN SPS 11.3.1 General Limitation Considerations Since it became clear, that reasonable operation site locations for SPS only are given in the geosynchronous earth orbit (GEO) within the equatorial plane, this orbit had started to be seen as a narrow resource. So, prior to geographical considerations of SPS introduction and advancement for specified regions, so as Western Europe, it has to be made evident that the orbital limitations correspond with the long term procurement claims of such a system. 11.3.1.1 Physical Constraints Generally, the orbital limits are defined by a suitable implantation sector, which grants efficient beaming into the specified region on the one hand, and on the other hand by orbital separation conditions dictated through minimum interaction allowances of neighboured SPS. Assuming feasible rectenna site locations not above 60 degrees latitude (Oslo) - as have been argued prior in this study - the considerable surface area of Western Europe is situated within 10 degrees Western and 25 degrees Eastern longitudes (meaning Western border of Ireland and Portugal to West coast of Turkey). This claims a GEO portion of 35 degrees or 25 760 km in-orbit distance. This portion may be a rather big one - but a proper separation of SPS with respect to their neighbouring interactions stringently may reduce a suitable number of station spots in the orbit.
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