区域CORS在线定位系统设计与实现

目前我国大部分省市已建立连续运行参考站系统且获得大量观测成果,但是由于涉及到数据保密问题,CORS系统成果的利用仍局限于政府部门。文中以已有CORS在线服务系统软件架构为基础,加入用户参数设置及结果分析模块,研发区域CORS在线定位系统(Regional CORS Online Positioning System,RCOPS)。由于区域CORS基准站密度大于IGS站密度,降低基准站与用户站的距离,有利于削弱站间距离相关误差,从而提高相对定位精度。经过实际数据测试,得出RCOPS系统(基准站与待定点平均距离51km)精度在XYZ方向上可以达到毫米级,高于使用IGS站作为基准站(IGS站与待定点距离大于500km)进行事后定位的精度。

Design and application of software platform for regional CORS online positioning system

At present,the majority of provinces and cities have established continuously operating reference station system and obtained a large number of observation results.Due to the security of the data,the applications of the observation results are limited to government departments.In this paper,based on the existing CORS online service system software architecture,the regional CORS online positioning system (RCOPS)is developed including the user parameter settings and result analysis module.T he density of the regional CORS is larger than that of IGS stations.So,the distance of base station and user station is nearer,and relative errors are decreasing.T hen,the relative positioning precision is improved.It is tested by the actual observations that the post positioning accuracy of the RCOPS(the average distance between base station and fixed point is 51 km)can reach to the level of mm in XYZ direction,w hich is higher than that of using IGS as base stations(the average distance between IGS station and fixed point is more than 500 km).