论文部分内容阅读
卫星帆板及本体受照情况变化复杂,导致卫星光压摄动力的变化难以准确模制,是动力学定轨的最大误差源,也是定轨预报精度降低的主要原因.针对此问题,采用北斗地面系统的区域监测网数据,详细比较了3种主要的经验模型(T20/T30模型系列、ECOM5参数模型、ECOM9参数模型)对不同卫星的适用性情况.结果显示在春秋分前后,GEO卫星使用ECOM9参数模型最好,其解算的卫星钟差与星地双向钟差的互差标准差优于2ns;对于IGSO/MEO卫星,无论是在动偏期间还是姿态模式转换期间,T20模型表现出更好的适用性.不同于此前国内外学者的相关研究,本文的结论表明,对BDS混合星座的不同类型卫星、同一卫星的不同时段,应采用不同的经验太阳光压模型以获得更高的定轨和预报精度.
Satellite windsurfer and body illumination changes complicated, resulting in changes in the satellite optical pressure photographic difficult to accurately mold, is the largest kinetic orbit determination error source, is also the main reason for the orbit determination accuracy is reduced.For this problem, the Beidou The data of the regional monitoring network of the terrestrial system are compared in detail with the applicability of three main empirical models (T20 / T30 model series, ECOM5 parameter model and ECOM9 parameter model) to different satellites.The results show that before and after the Spring and Autumn Period, the use of GEO satellites The ECOM9 parameter model is the best, and the standard deviation of the difference between the satellite clock offset and the satellite two-way clock offset is better than 2 ns. For the IGSO / MEO satellite, the T20 model shows that during the shift or the gesture mode transition Better applicability.Different from the previous domestic and foreign scholars related research, the conclusion of this paper shows that different types of BDS mixed constellation of different types of satellites, the same satellite at different times, different empirical models should be used to obtain a higher solar pressure Orbit determination and forecast accuracy.