卫星星座的结构演化

主要研究星座几何结构的演化问题，分析了在地球扁率摄动和卫星的入轨偏差影响下轨道的演化过程，以卫星的相位和升交点赤经为参数描述了星座结构演化的一般规律，又以星下点轨迹变化和星下点的相互位置关系的变化为参数描述了区域星座结构演化的地域特性．分析表明，地球扁率摄动将导致星座结构的整体漂移，而卫星的入轨偏差则会导致星座几何结构的紊乱，特别是轨道半长轴的偏差，将是影响星座几何结构稳定性的决定因素．

The Structure Evolution of Satellite Constellation

The secular evolution of geometrical structure of satellite constellation is focused. The satellite orbital evolution that caused by the Earth oblate perturbation and the bias of satellite injecting orbit is analyzed. The general character of structure evolution of constellation is discussed. The parameters about the subsatellite point trace of regional constellation and relative position of subsatellite point are used to describe the geometrical structure evolution of constellation. The analysis are given, it to shows that the Earth oblate perturbation will lead the whole shift of constellation geometry, and that the bias of satellite injecting orbit will lead the constellation disorder, in particular, the bias of semi-major axis is very significant, it will determine the stability of regional constellation.