中文摘要：

归纳了目前GOCE卫星几何轨道存在的主要问题和约化动力学轨道用于GOCE卫星SST重力场恢复的主要缺点，系统研究了GOCE卫星几何轨道动力学平滑方法。利用ESA提供的GOCE卫星几何轨道、加速度计和姿态数据分析了不同重力场模型不同阶次下的动力学轨道平滑精度。计算结果表明：利用GOCE卫星最新公布的GOC0O2S模型进行动力学平滑，其精度明显好于EIGEN-5C、GRACE2010S模型的轨道平滑结果，略优于GOCO01S的计算结果。180阶次重力场模型轨道平滑结果明显优于120和150阶次的重力场模型轨道平滑结果。180阶次GOCO02S重力场模型动力学平滑轨道精度可达1．8cm，较平滑前几何轨道精度2．1cm提高了14％以上，并获得了约0．05mm／s的平滑速度精度。因此建议在GOCE轨道确定及动力学平滑中，应采用180阶次的最新公布的GOCO01S或GOCO02S重力场模型。

英文摘要：

The shortcomings of SST gravity field recovery from GOCE reduce dynamic orbit are pointed out and the main problems of using GOCE kinematic orbit provided by ESA are analyzed. We present the dynamics smoothing method for GOCE ki- nematic orbit. The orbit smoothing accuracies （ OSAs ） using different gravity field model with different degree and order （ d/o ） are compared. The computational results show that the OSA of GOCO02S is the best one and obviously higher than those of EIGEN - 5C and ITG - GRACE2010S, and a little better than that of GOCO01S. The OSA using gravity field model with 180 d/ o is higher than those with 120 and 150 d/o. The OSA of GOCO02S with 180 d/o is about 1.8cm, and gains more than 14% improvement compared to kinematic orbits with 2. 1cm accuracy. The velocity accuracy of smoothing orbit can reach O. 05mm/s when gravity field model with at least 150 d/o is used and there is no noticeable accuracy difference between the above - mentioned models for velocity determination.