上海航天（中英文）2024，Vol.41Issue(6)：23-30,8.DOI:10.19328/j.cnki.2096-8655.2024.06.003
多测站联合初始轨道确定及不确定性估计方法
Multi-station Joint Initial Orbit-determination and Uncertainty Estimation Method
摘要
Abstract
Due to the lack of range information constraints,the orbit-determination results of single-station goniometric data in short-arc segments have great uncertainties.A joint orbit-determination algorithm that can directly use the observation data from multiple stations is proposed for the problem of multi-station joint orbit-determination under extremely short-arc conditions.The algorithm does not require the time synchronisation of the joint measurements,and the measurement data with different accuracy can be weighted.At the same time,the corresponding uncertainty estimation method is proposed,and the unscented transformation(UT)is used to calculate the orbit-determination covariance,by which the probability of the orbit-determination results can be described.Simulation experiments are carried out with two-station optical measurements as an example.The results show that the joint two-station orbit-determination can achieve high orbit-determination accuracy when the observation arc segment is less than 0.1%of the orbit period.The semi-long-axis accuracy of GEO and HEO satellites is in the order of kilometers,and that of LEO satellites is in the order of 100 meters.关键词
初始轨道确定/联合观测/改进Laplace算法/最小二乘法Key words
initial orbit-determination/joint observation/improved Laplace algorithm/least squares method分类
航空航天引用本文复制引用
陶雪峰,赵帅龙,李智..多测站联合初始轨道确定及不确定性估计方法[J].上海航天（中英文）,2024,41(6):23-30,8.基金项目
军队科研项目资助(O2022A09228) （O2022A09228）
