Satellite laser-ranging is successfully used in space geodesy, geodynamics and Earth sciences; and to test fundamental physics and specific features of General Relativity. We present a confirmation to approximately one part in a billion of the fundamental weak equivalence principle ("uniqueness of free fall") in the Earth's gravitational field, obtained with three laser-ranged satellites, at previously untested range and with previously untested materials. The weak equivalence principle is at the foundation of General Relativity and of most gravitational theories.

译文

:卫星激光测距技术已成功用于太空大地测量学,地球动力学和地球科学中;并测试广义相对论的基本物理学和特定特征。我们对地球引力场中十亿分之一的基本弱当量原理(“自由落体的唯一性”)进行了确认,该原理是由三颗激光测距卫星,以前未经测试的范围和未经测试的材料获得的。弱等价原理是广义相对论和大多数引力论的基础。

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