中文摘要：

北斗卫星导航定位系统中包含了GEO/IGSO/MEO三种不同类型的卫星,每种类型的卫星分别具有独特的运行特性。本文利用香港地区锦田站的实测数据,从广播星历中提取轨道参数计算获得了北斗卫星导航系统（BDS）的卫星轨道运行周期,并以图表的形式直观展示了GEO/IGSO/MEO卫星的轨道特征。实验结果证明,GEO与IGSO卫星的轨道重复周期均为一个恒星日时长,MEO卫星的轨道重复周期为近7个恒星日时长,可为后期BDS定位中的周期性误差研究提供参考。

英文摘要：

Beidou satellite navigation and positioning system includes three different types of satellites,they are GEO/IGSO/MEO,each type of satellites have unique operating characteristics.BDS orbital repeat period were obtained by calculating the orbital parameters that extracted from broadcast ephemeris in Kam Tin HK Station,and the features of GEO/IGSO/MEO satellite orbit were displayed in chart form.Experimental results show that the orbital repeat period of GEO and IGSO satellites are about one sidereal day,and that about 7sidereal days to MEO satellites,and this can provide a reference for study on periodical error in BDS positioning in the late.