Performance analysis of the tight combination of GPS,BDS,GALILEO,and QZSS mixed frequencies signalsOAEI
Performance analysis of the tight combination of GPS,BDS,GALILEO,and QZSS mixed frequencies signals
With the gradual development and modernization of satellite navigation systems,using observation information from multi-GNSS has become one of the hot-spot issues in recent years.Multi-system loose combinations form double-difference observation equations within their respective systems,and the positioning effect is improved.However,the interchangeability and compatible interoperability between global navigation satellite systems(GNSS)cannot be truly realized.At the same time,when the number of visible satellites decreases abruptly,the positioning performance deteriorates sharply.This paper focuses on the GNSS multi-system tight combination relative positioning technique,gives a mathe-matical model of multi-system tight combination relative positioning considering differential inter-system bias(DISB),and analyzes the time-varying characteristics of DISB at overlapping and non-overlapping frequencies among GPS/Galileo,GPS/BDS,and GPS/QZSS in terms of receiver brand,tem-perature,and receiver restart.The GNSS tight combination relative positioning performance is verified by static data from Curtin University and dynamic data measured at Taiyuan University of Technology.The results show that compared with loose combination,the ambiguity-fixed rate increases from 62.18％to 97.60％for static data and from 74.97％to 99.53％for dynamic data when the elevation mask angle is 50°,resulting in a significant improvement in positioning performance.
Yu Han;Fangjun Qin;Xugang Lian;Shengliang Wang;Leiyuan Qian;Wenhua Huang
College of Electrical Engineering,Naval University of Engineering,Wuhan 430033,ChinaCollege of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,ChinaCollege of Mining Engineering,Taiyuan University of Technology,Taiyuan 030024,China||State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang 050081,China||State Key Laboratory of Geodesy and Earth's Dynamics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430077,ChinaChina Energy Engineering Group Shanxi Electric Power Engineering CO.LTD.,Taiyuan 030001,China
GNSSMix frequenciesRedundancyTight combinationDifferential inter-system bias
《大地测量与地球动力学（英文版）》 2024 (004)
366-378 / 13
This work was jointly supported by the Natural Science Foun-dation of Shanxi Provincial(Grant No.202203021211153),the Basic Research Program of Shanxi Province(Grant No.202203021212284),Open Foundation of the State Key Laboratory of Satellite Navigation System and Equipment Technology(Grant No.CEPNT2022B07),the Open Foundation of the State Key Laboratory of Geodesy and Earth's Dynamics(Grant No.SKLGED2022-3-4),and the research on appli-cation technology of Beidou in the field of energy and power(Grant No.CEEC2022-ZDYF-01).
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