顾及GEO轨道特性的BDS相对定位研究  

A study on relative positioning of BDS considering GEO orbital characteristics

作　　者：王天乐 高成发[1] 魏建雄 WANG Tianle;GAO Chengfa;WEI Jianxiong(School of Transportation,Southeast University,Nanjing 211189,China;Nanjing Institute of Measurement and Testing technology,Nanjing 211106,China)

机构地区：[1]东南大学交通学院,江苏南京211189 [2]南京市计量监督检测院,江苏南京211106

出　　处：《测绘通报》2024年第11期83-89,共7页Bulletin of Surveying and Mapping

基　　金：星地联合增强多频多系统GNSS高精度定位研究(JLY2024001)。

摘　　要：针对BDS系统动态相对定位较少顾及GEO轨道特性的问题,本文分析了GEO卫星空间信号质量和观测值质量,顾及GEO轨道特性,基于站间单差残差和降权因子改善随机模型;并验证分析了剔除全部GEO和部分GEO情况下的定位性能。试验结果表明,顾及GEO轨道特性剔除部分GEO卫星并对随机模型进行改善,能够保证观测卫星数量,提升了模糊度固定率和动态相对定位精度。Considering the issue that dynamic relative positioning of the BDS system rarely takes GEO orbital characteristics into account,this paper analyzes the spatial signal quality and observation value quality of GEO satellites.By considering GEO orbital characteristics,the stochastic model is improved based on inter-station single-difference residuals and a downweighting factor.The positioning performance is verified and analyzed under the conditions of excluding all GEO satellites and excluding some GEO satellites.The experimental results show that considering the GEO orbital characteristics,excluding some GEO satellites,and improving the stochastic model can ensure the number of observed satellites,enhance the ambiguity resolution rate,and improve the accuracy of dynamic relative positioning.

关 键 词：GEO卫星 动态相对定位 BDS 随机模型 

分 类 号：P228[天文地球—大地测量学与测量工程]