第二类无奇点根数的北斗历书参数设计

发布时间：2018-05-03 11:43

本文选题：北斗卫星导航系统 + 历书拟合　；参考：《宇航学报》2016年11期

【摘要】：为统一北斗三类卫星的历书拟合算法,提出基于第二类无奇点根数进行历书参数设计的方法,设计了以倾角向量变率作为摄动参数的历书参数模型,并给出新的历书模型的用户使用算法。利用覆盖2013年全年的实际在轨卫星的数值轨道进行了历书拟合试验。结果表明,地球静止轨道(GEO)和倾斜地球同步轨道(IGSO)卫星的拟合位置误差为2~4 km,拟合用户距离误差(URE)约为1 km,中圆地球轨道(MEO)卫星的拟合位置误差为1~2 km,拟合URE约为500 m。通过分析6个轨道根数和2个摄动参数全年的变化范围,对新历书模型进行量化单位和占用比特位的通信接口设计,定量分析量化单位对历书表达精度的影响。结果表明,参数截断后对位置误差的影响小于50 m,对URE误差的影响小于5 m。因此,历书量化误差对信号捕获以及首次定位时间带来的影响可以忽略不计。
[Abstract]:In order to unify the almanac fitting algorithm of the three kind of Beidou satellite, a method based on the second classes of no odd point root number is proposed. The almanac parameter model with the variable rate of tilt vector is designed as the perturbation parameter, and the new ALMANAC model is given by the user. The numerical orbit of the actual on orbit satellite in 2013 is covered. The fitting position error of the geostationary orbit (GEO) and the tilted geostationary orbit (IGSO) satellite is 2~4 km, the fitting user distance error (URE) is about 1 km, the fitting position error of the middle circle earth orbit (MEO) satellite is 1~2 km, and the fitting URE is about 500 m. through the analysis of 6 orbital roots and 2 perturbation parameters. The change range of the whole year, the design of the communication interface between the quantitative unit and the occupancy bit of the new calendar model, the quantitative analysis of the influence of the quantized unit on the accuracy of the almanac expression. The results show that the effect of the parameter truncation on the position error is less than 50 m, and the influence on the URE error is less than 5 m., so the quantitative error of the almanac is captured and first of the first signal. The impact of the sub location time can be ignored.

【作者单位】：中国科学院上海天文台;北京卫星导航中心;信息工程大学导航与空天目标工程学院;国防大学;
【基金】：国家自然科学基金(41204022,41574029,41274043) 上海市空间导航与定位技术重点实验室基金(14DZ2276100)
【分类号】：V412.41

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