北斗四频中长基线模糊度解算研究  

BDS quad-frequency medium and long baseline ambiguity resolution

作　　者：曹相 张杰 高成发[2] 邵沛涵 CAO Xiang;ZHANG Jie;GAO Chengfa;SHAO Peihan(Nanjing Institute of Measurement and Testing Technology,Nanjing 210049,China;School of Transportation,Southeast University,Nanjing 211189,China)

机构地区：[1]南京市计量监督检测院,南京210049 [2]东南大学交通学院,南京211189

出　　处：《南京信息工程大学学报（自然科学版）》2024年第1期137-144,共8页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：国家市场监督管理总局技术保障专项(2021YJ025)。

摘　　要：随着北斗三号卫星导航系统完成全球组网并正式开通,中国已成为世界上第3个独立拥有全球卫星导航系统的国家.目前BDS-3卫星可播发5个频点的观测信号,研究BDS-3多频组合对于实现模糊度快速固定、提高定位精度具有重要意义.针对中长基线解算,本文充分利用BDS-3四频中存在电离层延迟极小且具有整数特性的组合,同时考虑对流层延迟的影响,建立了基于弱电离层组合的中长基线解算模型.实验结果表明,相比于传统双频无电离层模型,该模型的模糊度固定速度提高10%以上,N、E、U 3个方向定位精度相比最优双频无电离层组合分别提高了7.7%、7.9%、8.2%.With the completion of the BDS-3,China has become the third country that has global navigation satellite system.Furthermore,BDS-3 can broadcast observation signals up to five frequencies,which has great significance to achieve rapid fixing of ambiguity and improve positioning accuracy.The Ionosphere Reduced(IR)combination has minimal ionospheric delay and integer characteristics,therefore,a solution model based on IR combination is established for medium and long baseline utilizing the quad-frequency observations of BDS-3 in this paper.In the meanwhile,the tropospheric delay is estimated with tropospheric mapping function.The experimental results show that compared with traditional dual-frequency Ionosphere-Free(IF)model,the ambiguity fixing speed of the IR model is improved by more than 10%,and the positioning accuracy in north(N),east(E)and up(U)directions are improved by 7.7%,7.9%and 8.2%,respectively.

关 键 词：BDS-3 四频 模糊度解算 长基线 

分 类 号：P228[天文地球—大地测量学与测量工程]