基于地基光电望远镜的地球同步轨道卫星空间目标初轨确定研究OA北大核心CSTPCD

During the monitoring of GEO(geosynchronous Earth orbit,GEO)space ob-jects,there is a problem of failure in solving the initial orbital parameters due to the short arc length of the observation data.A multi-constraint initial orbit determination method for ground-based optical observation is proposed to address the problem.Firstly,a single-parameter orbit determination method is established from the small eccentricity of GEO space debris orbits to improve the solution success rate and accuracy.Secondly,based on Kepler's laws and the coplanar properties of short arcs,the observed arc segments are cor-related to increase the information and geometrical constraints of the observations.Finally,the solution accuracy is further improved by utilizing associated arc segments,making the algorithm more widely adaptable to orbit types.The method is validated using the real observations from the large-field telescope at the Changchun Observatory.The results show that the method can solve the orbit parameters quickly and efficiently.The percentage of the error of semi-major axis less of GEO objects than 200 km reaches 93.6％(average arc length is 70 s).Based on the calculated value and the proposed correlation method to reduce the error due to the eccentricity constraints,the error of semi-major axis can reach 30 km for some targets.The method will provide technical support for the field of space situational awareness in China.