Orbit determination of Chang’E-3 and positioning of the lander and the rover
Orbit determination of Chang’E-3 and positioning of the lander and the rover
复制标题
DOI：
10.1007/s11434-014-0542-9
复制
发表时间：
2014-07
影响因子：
--
通讯作者：
Yong Huang;Shengqi Chang;Peijia Li;Xiaogong Hu;Guangli Wang;Qinghui Liu;W. Zheng;Min Fan
中科院分区：
文献类型：
--
作者：
Yong Huang;Shengqi Chang;Peijia Li;Xiaogong Hu;Guangli Wang;Qinghui Liu;W. Zheng;Min Fan
嫦娥三号于2013年12月14日在虹湾以东地区着陆，实现了中国首次成功的月面软着陆。我们提出的精确轨道确定和定位的着陆器和漫游车的结果。我们描述了2014年12月2日至21日期间用于获得头寸知识的数据、建模和方法。计算中除了使用X波段辐射测距和多普勒跟踪数据外，还使用了三角差分单向测距数据，大大提高了轨道重建的精度。对于100 km × 100 km和100 km× 15 km的月球轨道，总位置重叠差分别约为20和30 m，相对于CE-2增加了约50%，与近年来的其他月球航天器（如SELENE和月球侦察轨道器（LRO））处于同一水平。软着陆轨迹的位置误差小于100 m。应用运动学统计方法来确定着陆器的位置和漫游器相对于着陆器的相对位置。与LRO照片结果相比，着陆器的位置差异优于50 m。与着陆器和漫游车之间的Δ甚长基线干涉测量（VLBI）群延迟相比，Δ VLBI相位延迟可以将漫游车的相对位置从~ 1，000提高到~1 m。
Chang’E-3 landed on the east of Sinus Iridum area on December 14, 2013, performing China’s first successful soft landing on the lunar surface. We present the results on precision orbit determination and positioning of the lander and the rover. We describe the data, modeling, and methods used to achieve position knowledge over the period December 2–21, 2014. In addition to the radiometric X-band range and Doppler tracking data, delta differential one-way ranging data are also used in the calculation, which show that they strongly improve the accuracy of the orbit reconstruction. Total position overlap differences are about 20 and 30 m for the 100 km × 100 km and 100 km× 15 km lunar orbit, respectively, increased by ~50 % with respect to CE-2 and at the same level as other lunar spacecrafts of recent era such as SELENE and lunar reconnaissance orbiter (LRO). The position error of the soft landing trajectory is less than 100 m. A kinematic statistical method is applied to determine the position of the lander and relative position of the rover with respect to the lander. The position difference of the lander is better than 50 m compared to LRO photograph result. Compared with the delta very long baseline interferometry (VLBI) group delay between the lander and the rover, the delta VLBI phase delay can improve the relative position of the rover from ~1,000 to ~1 m.