深空探测学报（中英文）2025，Vol.12Issue(4)：377-390,14.DOI:10.3724/j.issn.2096-9287.2025.20250076
"鹊桥"通导遥星座系统基于卫星时空信息的定位优化方法
Positioning Optimization Method Based on Satellite Spatiotemporal Information for Queqiao Constellation System
摘要
Abstract
Due to the fact that the number of visible satellites is limited,the finiteness of observation information and the ill-condition of the observation equation seriously constrain the positioning accuracy of the Least Squares(LS)method.To ad-dress this,a spatiotemporal information-enhanced LS positioning optimization method for future Queqiao communication-navigation-remote sensing constellation was proposed,aiming to improve the robustness of LS-based solutions.First,an auxil-iary equation incorporating multi-epoch pseudorange observations was constructed,coupled with a dynamic weighting strategy based on a constant-velocity motion model,to effectively utilize historical data and mitigate information deficiency in dynamic scenarios.Second,multi-epoch inter-satellite distance measurements are introduced to form geometric constraints that to sup-press ill-conditioning in the observation model.Finally,a Forward-Backward Smoother(FBS)algorithm was applied to further refine positioning results and enhance solution stability.Simulation experiments based on platform-generated orbital data of the Queqiao constellation demonstrate that,under a 10 m orbital error and with a historical epoch length of 19,the proposed method—fusing multi-epoch pseudorange and inter-satellite distance data with FBS smoothing—achieved a positioning accuracy of 7.03±2.50 m.Compared to the conventional LS method without any auxiliary information or smoothing,the positioning mean error was reduced by 88.26%and the standard deviation by 96.14%,providing solid technical support for high-precision posi-tioning and navigation services required for Chinese astronauts'lunar surface operations.关键词
月轨卫星定位/最小二乘法/多历元观测数据融合/星间间距约束/双向滤波算法Key words
lunar orbit satellite positioning/least squares method/multi-epoch observation data fusion/inter-satellite dis-tance constraint/Forward-Backward Smoother(FBS)algorithm分类
天文与地球科学引用本文复制引用
李珍妮,陈立基,李茂登,陈旗鸣,何熊文,陈朝基,谢胜利.."鹊桥"通导遥星座系统基于卫星时空信息的定位优化方法[J].深空探测学报（中英文）,2025,12(4):377-390,14.基金项目
民用航天技术预先研究项目(D040102) （D040102）
