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GPS:3颗卫星在 (0,0), (10,0), (5,8) ,测得距离 5, 8, 6 。(三边测量——3个圆的方程组。)
GPS:3颗卫星在 (0,0), (10,0), (5,8) ,测得距离 5, 8, 6 。(三边测量——3个圆的方程组。)
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