Numericaldifferential 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。
2
Three methods for gravity field recovery are mainly studied from the views of observation equation, (1) numericaldifferential method, (2) energy balance approach, (3) numerical integration method.