With effect of geopotential and radiation energy, when the interior of the earth continued to melt, the surface of the earth solidified to form the original lithosphere.
当地球内部在重力势能和放射能的作用下继续熔融时，地球表面固化为原始岩石圈。
Numerical differential method and energy balance approach are applied respectively to recover the geopotential coefficients until 50 degree based on the simulated observation datum of CHAMP.
基于模拟的CHAMP卫星观测数据，分别用数值微分法和能量守恒法恢复50阶次的重力位系数。
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