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目前北斗卫星的定位服务精度为10米,授时精度为50纳秒,测速精度为0.2米/秒。要进一步改进北斗卫星的轨道精度,发展以北斗系统为依托的精密定位服务和应用,改进现有的北斗卫星轨道的扰动模型,尤其是光压模型是很重要的一环。太阳光压对卫星轨道的影响数值模拟表明,光压对GPS卫星轨道的半长轴有周期为半日的扰动,全振幅达16米,造成轨道偏心率持续增加,量级为1.5×10-6/天,由此造成卫星
Beidou satellite positioning service accuracy of 10 meters, timing accuracy of 50 nanoseconds, speed accuracy of 0.2 m / s. To further improve orbit precision of BeiDou satellite and develop precision positioning service and application based on BeiDou system, it is very important to improve the existing perturbation model of Beidou satellite orbit, especially light pressure model. The influence of solar pressure on the satellite orbit The numerical simulation shows that the light pressure has a half-day period disturbance on the semi-major axis of the GPS satellite orbit, with a total amplitude of 16 meters, resulting in a continuous increase in orbital eccentricity with a magnitude of 1.5 × 10-6 / Day, resulting in satellite