摘要
讨论了GPS/BD组合定位需要考虑的主要问题,自编了GPS/BD组合定位程序,利用实测GPS/BD观测数据分析了当前北斗导航定位系统可用性及GPS/BD组合前后的定位精度。试验结果表明,北斗已经能够提供区域的实时导航定位服务。GPS/BD组合定位在GPS观测卫星数较多时对GPS定位精度改善不明显,在GPS观测卫星数较少时可以显著提高定位精度和稳定性。
We discussed some main issues of combined GPS/BD single point positioning. A pro- gram was developed to process the combined GPS/BD data. Availability and positioning accuracy of BD and combined GPS/BD were analyzed. Preliminary results show that BD can provide re- gional navigation and positioning service with a accuracy of around 15 meters. Combined GP, S and BD cannot improve positioning accuracy under the condition that enough visible GPS satellites are available. In the case of bad GPS satellites geometry with insufficient visible GPS satellites, com- bined GPS/BD can improve positioning stability and accuracy.
出处
《测绘信息与工程》
2012年第4期1-3,36,共4页
Journal of Geomatics
基金
国家自然科学基金资助项目(40874017)
创新研究群体科学基金资助项目(40721001)
