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介绍了基于能量守恒定律恢复地球重力场模型的基本原理和算法。指出了CHAMP加速度计数据存在的问题,提出了整体求解尺度因子、偏差参数和偏差漂移的数学模型及差分算法。利用2002年1月的CHAMP快速科学轨道数据和加速度计数据计算出了50×50地球重力场模型XISM02。将该模型与EGM96,GRIM5C1,EIGEN1S,EIGEN2模型进行了比较,并用北极实测重力数据对上述模型进行了检验。结果表明:XISM02模型在北极地区精度与EIGEN1S,EIGEN2相当。 更多还原

【Abstract】 The theory and method of CHAMP gravity field recovery using energy conservation method are introduced. The problem related to the accelerometer data is pointed out. The mathematic model and differential arithmetic for calibrating the accelerometer data are presented, which can be used for estimating the scale, bias and bias drift parameter simultaneously and efficiently. Based on 30 days’ rapid science orbit and accelerometer data from CHAMP data centre, the 50 degree and order global gravity fi... 更多还原