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GPS: (0,0), (10,0), (5,8) の 3 つの衛星が距離 5, 8, 6 を測定。(三辺測量 — 3 つの円の方程式系。)
GPS: (0,0), (10,0), (5,8) の 3 つの衛星が距離 5, 8, 6 を測定。(三辺測量 — 3 つの円の方程式系。)
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