Article Details

Title · Authors · Abstract · Keywords · DOI · References

Analysis of PPP-RTK Positioning with Uncombined Atmospheric Constraints

HAN Ruijie1,2,3,4, YU Xuexiang1,2,3,4

(1.School of Spatial Information and Geomatics Engineering, Anhui University of Science and Technology, Huainan 232001, China; 2.Urban 3D Real Scene and Intelligent Security Monitoring Jointing Laboratory of Anhui Province, Huainan 232001, China; 3.Key Laboratory of Aviation-aerospace-ground Cooperative Monitoring and Early Warning of Coal Mining-induced Disasters of Anhui Higher Education Institutes, Anhui University of Science and Technology, Huainan 232001, China; 4.Engineering Research Center of Mining Area Environmental and Disaster Cooperative Monitoring, Anhui University of Science and Technology, Huainan 232001, China)

Section：Communication Engineering · Vol. 2026, Issue 3 · Pages：1-5 · 2096-4706（2026）03-0001-05 · CLC number：TP39；P228 · Document code：A · DOI：10.19850/j.cnki.2096-4706.2026.03.001

Abstract

Undifferenced and uncombined PPP-RTK technology effectively improves the convergence speed and positioning accuracy of Precise Point Positioning by introducing external atmospheric correction information. To verify the convergence speed and positioning accuracy of this technology, this paper constructs a PPP-RTK model with atmospheric correction based on the undifferenced and uncombined atmospheric extraction method at the server end. High-precision ionospheric and tropospheric delay products generated by regional reference networks provide data support. At the user end, the user achieves precise positioning by constraining observation values with atmospheric correction parameters. Experimental results show that the mean ionospheric modeling error is 0.1 m and the mean tropospheric error is 0.019 m. Atmospheric correction parameters form effective constraints on the positioning process. Under the baseline length of 100 km, after atmospheric correction, the horizontal errors of WROC and GOP6 stations after convergence are 9.79 cm and 2.55 cm respectively, the elevation errors are 3.88 cm and 4.17 cm respectively, and the ambiguity fixed rates reach 97.8% and 96.1% respectively, which verifies the effectiveness of this technology.

Keywords

PPP-RTK; atmospheric delay correction; undifferenced and uncombined; PPP

References

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Funding

Major Science and Technology Project of Anhui Province (202103a05020026); Anhui Province Key R&D Program (202104a07020014)

About the authors

Han Ruijie (1999-), male, Han ethnicity, from Hengshui, Hebei Province, is currently pursuing a master's degree in GNSS positioning; Corresponding author: Yu Xuexiang (1965-), male, Han nationality, from the Taihu Lake Lake, Anhui Province, professor, doctoral supervisor, doctor, research direction: satellite positioning technology and application, deformation monitoring automation.