BDS网络RTK参考站三频整周模糊度解算方法

发布时间：2018-05-21 16:01

本文选题：BDS + 网络RTK　；参考：《测绘学报》2017年04期

【摘要】：北斗卫星导航系统是目前唯一一个全星座提供三频观测数据的卫星导航定位系统,三频观测值有助于载波相位整周模糊度的快速、准确固定。本文提出了一种BDS网络RTK参考站三频整周模糊度解算方法。首先利用B2、B3频率的观测值及严格的模糊度固定标准确定超宽巷整周模糊度,将固定的超宽巷整周模糊度与其他宽巷整周模糊度的线性关系作为约束条件,然后估计宽巷整周模糊度、相对天顶对流层延迟误差和电离层延迟误差,并搜索确定宽巷整周模糊度。利用固定的宽巷整周模糊度与三频载波相位整周模糊度的整数线性关系,将线性关系加入载波相位整周模糊度参数估计观测模型中,然后确定载波相位整周模糊度。使用实测的CORS网BDS三频观测数据进行算法验证,结果表明,该方法可正确有效地实现参考站间三频载波相位整周模糊度的快速解算。
[Abstract]:Beidou satellite navigation system is the only satellite navigation and positioning system in which the whole constellation provides the three-frequency observation data. The three-frequency observation value is helpful to the fast and accurate fixing of the carrier phase integer ambiguity. This paper presents a three-frequency integer ambiguity resolution method for RTK reference stations in BDS networks. Firstly, the integer ambiguity of ultra-wide roadway is determined by using the observation value of B _ 2 and B _ 3 frequency and the strict standard of ambiguity. The linear relation between the fixed integer ambiguity of super-wide roadway and the integer ambiguity of other wide roadway is taken as the constraint condition. Then the integer ambiguity relative to zenith tropospheric error and ionospheric delay error are estimated and the integer ambiguity of wide lane is determined. By using the integer linear relation between the fixed integer ambiguity of wide lane and the integer ambiguity of three-frequency carrier phase, the linear relation is added to the observation model of the parameter estimation of carrier phase integer cycle ambiguity, and then the carrier phase integer cycle ambiguity is determined. The algorithm is verified by the measured BDS three-frequency observation data of CORS net. The results show that this method can be used to calculate the integer ambiguity of three-frequency carrier phase between reference stations correctly and effectively.
【作者单位】：辽宁工程技术大学测绘与地理科学学院;德国地学研究中心;
【基金】：国家重点研发计划(2016YFC0803102) 国家自然科学基金(41504010;41474020;41504030) 国家863计划(2014AA123101) 辽宁省高等学校创新团队项目(LT2015013) 辽宁省博士启动基金(20141141;201501126)~~
【分类号】：P228.4

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