解説ConstellationGPS.gifEnglish: A simulation of the original design of the GPS space segment, with 24 GPS satellites (4 satellites in each of 6 orbits), showing the evolution of the number of visible satellites from a fixed point (45°N) on earth (considering "visibility" as having direct line of sight).

日付2007年12月7日 (当初のアップロード日)

原典en.wikipedia
作者英語版ウィキペディア
このファイルは、2014年1月31日の今日のメディア


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