BDS地基增强系统单双模定位性能比较

Comparison of positioning performance of BDS ground-based augmentation system in different modes

为了进一步研究BDS地基增强系统,针对郑州BDS地基增强系统的服务时效性、实时静态定位精度、实时动态定位精度,在单GPS和BDS/GPS 2种模式下对定位测量精度、内符合精度、外符合精度和初始化时间进行了测试分析。测试结果表明,相比较GPS地基增强系统而言,利用BDS/GPS差分数据的流动站初始化时间明显缩短,定位精度也有一定程度的提高,实时精密定位水平精度达到2cm,高程精度达到4cm。

In order to further study on BDS GBAS,the location performance of BDS GBAS in Zhengzhou city,such as service timeliness,real-time static positioning accuracy and real-time dynamic positioning accuracy,was tested in the paper.The tests included positioning accuracy,inner accord precision,external accord accuracy and initialization time in the single GPS and BDS/GPS modes.Result showed that compared with GPS GBAS,the rover initialization time with differential data of BDS/GPS could be shortened and the positioning accuracy could be improved as the horizontal accuracy of 2cm,and the altitude accuracy of 4cm in the real-time high precision positioning.