北斗卫星导航系统高精度相对定位性能分析

Analysis of BDS Performance for High-precision Relative Positioning

通过实际采集的北斗卫星导航系统广播星历数据,计算北斗卫星导航系统卫星的位置,分析我国北斗卫星导航系统星座在不同纬度条件下的可视情况。采用两台BDS/GPS接收机同时接收北斗卫星导航系统与全球定位系统数据,单独利用北斗卫星导航系统与全球定位系统系统进行静态基线解算,结果表明,目前我国北斗卫星导航系统的定位精度和全球定位系统相当。利用单历元算法对基线进行"实时"解算,在X轴和Y轴方向北斗卫星导航系统精度稍差,在Z轴方向二者精度相当。

The view-capacity of BeiDou navigation satellite system(BDS)constellation in different latitude and longitude is analyzed by calculating the real BDS broadcast navigation files.In order to analysis the capacity of BDS relative positioning,two BDS/GPS receivers are used to collect about 2hours' data,and baselines are estimated by BDS and GPS,respectively.The precision of baseline estimated by BDS is millimeter-level,correspond to the GPS performance.Stop-and-Go algorithm is used for estimating the baseline'on time';precision of baseline estimated by BDS is less than GPS at the direction of X-axis and Y-axis,but the Z-axis direction is almost same.