There were two main part of error source, the local reference system which was about 0.15as and the measurement coordinates of objects which were about 0.45as.
详细分析了主要的误差来源，分别是由参考星决定的局部参考架的误差约0.15角秒，目标量度坐标误差约为0.45角秒。
The numerical precision and formulation efficiency of multibody system dynamics directly depend on the choosing the local frame coordinates and global coordinate, and on the formulation methods.
流形上动力学方程的建立与全局坐标和局部坐标的选择，以及建模方法有着直接的联系，决定着动力学模型的建模效率和数值运算精度。
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