Influence of Solar Radiation Perturbation Model Refinement on Autonomous Orbit Determination of Navigation Satellites
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摘要: 以GPS卫星为例,提出了一种太阳光压模型精化方法。该方法能使卫星升交点赤经及轨道倾角在180d内的预报误差控制在±40mas左右,较显著地提高了自主定轨卫星轨道的切向和法向精度,最终改善了用户测距误差,对卫星轨道径向改善不明显,对钟差项几乎没有影响。Abstract: We proposed a refinement method of solar radiation perturbation model in autonomous orbit determination of navigation satellites.With this method,the prediction errors of GPS satellites’ Ω and i could be controlled at ±40 mas level during 180 days.As a result,the tangential and normal direction precision of satellites’ orbit improved in the autonomous orbit determination when constrained the predictions of Ω and i.Finally,user range error became smaller.However,this method has small influences on radial direction of orbit as well as clock bias.
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