中文摘要：

当形成飞时，太空船被用作站台获得土面向的观察，在这些太空船之间的精确基线总是是必要的。严肃恢复和气候实验(优雅) 使命针对印射全球严肃地和它的变化。优雅卫星的精确基线为当模特儿的严肃地是必要的。成双的卫星的运动学、减少的动态相对轨道的决心为动态相对轨道在 2 公里的这份报纸，和精确性被学习了，为运动学的 5 公里能被获得，大多数在 GPS 歧义上的双差别由此被解决。

英文摘要：

When formation flying spacecrafts are used as platform to gain earth oriented observation, precise baselines between these spacecrafts are always essential. Gravity recovery and climate experiment （GRACE） mission is aimed at mapping the global gravity field and its variation. Accurate baseline of GRACE satellites is necessary for the gravity field modeling. The determination of kinematic and reduced dynamic relative orbits of twin satellites has been studied in this paper, and an accuracy of 2 mm for dynamic relative orbits and 5 mm for kinematic ones can be obtained, whereby most of the double difference onboard GPS ambiguities are resolved.