地球卫星动力学定轨中摄动模型的选取

Selection of Perturbation Model for Earth Satellite Dynamic Orbit Determination

地球卫星动力学定轨中需要依据卫星轨道高度考虑不同的摄动项,以提高定轨精度。针对这一需求,分析了不同轨道高度下卫星所受的地球非球形、日月引力、太阳光压和大气阻力4种摄动项对二体模型的校正量,数值仿真表明实验结果与摄动项的力学分析相吻合,另外,给出了地球卫星动力学定轨中不同轨道下卫星摄动项的选取原则。

According to the height of satellite orbit,different perturbation terms should be considered in the earth satellite dynamics orbit determination for improving the orbit determination precision.In response to this requirement,the correction of the four perturbation terms of the Earth’s non-spherical,solar and gravitational,solar pressure and atmospheric resistance is calculated and analyzed for the two-body model at different orbital altitudes in this paper.In the aspect of mechanics,the results of numerical simulation experiment are consistent with the perturbation theory.In the end,the principle of selecting satellite perturbation terms in different orbits of earth satellite dynamics orbit determination is discussed.