当前位置：
X-MOL 学术
›
Adv. Space Res.
›
论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Precise positioning of Chang’e 3 lander based on Helmert-VCE-aided weighting method using phase delay data from Chinese VLBI Network
Advances in Space Research ( IF 2.6 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.asr.2020.05.034 Shanhong Liu , Jianguo Yan , Qingbao He , Jianfeng Cao , Mao Ye , Jean-Pierre Barriot
Advances in Space Research ( IF 2.6 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.asr.2020.05.034 Shanhong Liu , Jianguo Yan , Qingbao He , Jianfeng Cao , Mao Ye , Jean-Pierre Barriot
Abstract The precise positioning of a lander is a key issue during in situ planetary exploration. This paper proposes an optimal weighting algorithm based on a Helmert-variance component estimation applied to VLBI phase delay data. We validated our algorithm on Chang’e 3 lander VLBI phase delay from the Chinese VLBI Network. We consider that the lander positioning accuracy achieved with our new algorithm is at least 53 % better, compared to previous estimations based on the same observations. The position of the lander based on continuous 4-day observations was estimated to be 44.1215 ° N ( ± 21.9 m), −19.5135 ° E ( ± 4.2 m) and −2632.7 m ( ± 18.9 m) with respect to a moon reference system. This result agrees well with the position derived from images taken by the Narrow Angle Camera on the Lunar Reconnaissance Orbiter.
更新日期：2020-09-01
京公网安备 11010802027423号