星载GPS GEO卫星定轨的太阳光压宏观模型

摘要

The space-based orbit determination method using space-borne GPS based on macro-model approach was proposed to determine the geostationary orbit (GEO) onboard. Integral filter method was used to get the continuous orbit results based on space-borne GPS measurement and dynamic information of GEO satellite. Macro-model approach was used to calculate the force caused by solar pressure to solve the problem of difficulty in describing it. The formulae of force acting on flat plate, sphere and cylinder was derived, and a macro-model of Fengyun fourth satellite was established, which were combined by flat plates. Integral filter was used to o-vercome the problem of poor visibility for space-borne GPS onboard GEO satellites. Results from the simulation tests showed that the proposed method were effective and was able to improve the accuracy of orbit determination for GEO satellites.%提出了基于太阳光压宏观模型的星载GPS定轨方法,用于在星上确定地球静止卫星轨道.融合卫星运动学信息和星载GPS观测,采用积分滤波法得到连续的轨道解；针对星上太阳光压难以建模的问题,利用宏观模型方法计算GEO卫星所受的光压力.给出了作用在平面板、球形和圆柱形上的光压计算公式,并以“风云四号”卫星为例,建立了相应的宏观模型.最后进行了仿真实验,结果表明所提出的方法可行有效,可以提高GEO卫星定轨精度.