利用单北斗卫星导航系统建立高精度区域坐标框架的研究与实践

当前区域高精度坐标框架建立严重依赖GPS,利用我国自主研发的北斗卫星导航定位系统(BDS)建立高精度地球参考框架具有重要的战略和现实意义。本文采用基于非差观测值的非差处理模式,单独利用常州基准站(CZCORS)的BDS数据,建立了高精度常州市域坐标框架。将基于单北斗获得的CGCS2000坐标成果与GPS结果进行了比较,两者差异较小,平面和高程方向的平均RMS值分别为3.1和4.2 mm。结果表明,单独使用北斗建立区域参考框架可以满足工程建设的需求,这为北斗系统的推广应用提供了重要的参考依据。

Performance analysis of high-precision regional reference frame establishment using BDS data only

Nowadays, GPS is the main technology for the establishment of regional high-precision coordinate frame. Since BeiDou Satellite Navigation and Positioning System (BDS) is developed by China independently, it is very important to assess the possibilities to establish a high-precision reference frame using the BDS only. In this paper, a high-precision regional coordinate frame of Changzhou city is established by using BDS data from Changzhou Continuously Operating Reference Stations (CZCORS), where an un difference data processing strategy is adopted. The results are compared with those of GPS. It is found that the difference between them is quite small. The average RMS values in the horizontal and vertical directions are 3.1 and 4.2 mm, respectively. These confirms the potential for BDS to establish the regional reference framework.