Orbit determination of Chang'E-3 and positioning of the lander and the rover

查看全文 作　　者：Yong [1]Huang;Shengqi [1,2]Chang;Peijia [1]Li;Xiaogong [1]Hu;Guangli [1]Wang;Qinghui [1]Liu;Weimin [1]Zheng;Min [3]Fan

机构地区：[1]Shanghai Astronomical Observatory,Chinese Academy of Sciences;[2]University of Chinese Academy of Sciences;[3]Beijing Institute of Tracking and Telecommunications Technology

出　　处：《Chinese Science Bulletin》索引2014年第59卷第29期,共10页

基　　金：supported by the National Natural Science Foundation of China (11073047,11173052);the Science and Technology Commission of Shanghai (12DZ2273300);the National High Technology Research and Development Program of China (2012AA121603);the Planetary Sciences Laboratory of Chinese Academy of Sciences;the Lunar Exploration Project of China 摘　　要：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 9 100 km and100 km9 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 than50 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. 关键词：精密定轨着陆器月球车定位甚长基线干涉测量 SELENE 位置误差相对位置

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Orbit determination of Chang'E-3 and positioning of the lander and the rover

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