摘要
分析了脉冲经验力和分段线性经验力两种机动力模型在GEO卫星机动期间定轨和机动后轨道预报中的适用性,同时比较了两种机动力建模方法与短弧动力学方法之间在轨道预报方面的优劣。实验结果表明,在机动定轨中,脉冲经验力模型比分段线性模型更优越。两种机动力建模方法东西机动期间单天弧段轨道拟合精度可优于5m,但线性模型轨道预报精度比脉冲经验力模型和短弧动力学方法差。C波段观测量能够改善机动期间定轨精度。
When GEO satellite is used in a navigation constellation, its prediction orbit must be determined during the orbit maneuver. Two strategies which include constructing dynam- ic thrust model and estimating the parameter in short-arc are mainly used to solve this prob lem. The piecewise linear acceleration model and instantaneous velocity changes （pulse） model are used for GEO orbit determination and orbit prediction at maneuver time, and their applicability are evaluated, also their advantage and disadvantage for orbit determination and prediction are compared with short-arc strategy. It showed that instantaneous velocity chan- ges acceleration model is superiority to the piecewise linear acceleration model for determi- ning the maneuver orbit. These two kinds of dynamic model method can fit the maneuver track of one day with an error no more than 5 m, but orbit prediction accuracy of the piece wise linear model is inferiority to the short-arc strategy and the pulse acceleration model. The accuracy of maneuver orbit determination can be improved by combining the C band transfer observation with L band observation.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2013年第10期1196-1200,1206,共6页
Geomatics and Information Science of Wuhan University
基金
国家自然科学基金资助项目(41074020)
