Research on refinement of the empirical tropospheric models and enhanced precise point positioning

Rui Zhang; Jiaqi Liu; Kui He; Shuiling Xiong; Wei Jiang

doi:10.1117/12.3049095

27 November 2024 Research on refinement of the empirical tropospheric models and enhanced precise point positioning

Rui Zhang, Jiaqi Liu, Kui He, Shuiling Xiong, Wei Jiang

Proceedings Volume 13402, International Conference on Remote Sensing, Mapping, and Geographic Information Systems (RSMG 2024); 134022L (2024) https://doi.org/10.1117/12.3049095
Event: International Conference on Remote Sensing, Mapping, and Geographic Information Systems (RSMG 2024), 2024, Zhengzhou, China

Abstract

Through solving the difference between zenith tropospheric delay (ZTD) obtained from the empirical tropospheric model and real ZTD, this research determines a refined tropospheric model by utilizing the relationship between the foregoing difference and latitude and altitude. Moreover, the model proposed is introduced in the precise point positioning (PPP) for ZTD-constrained PPP, which reduces the convergence time of PPP while improving its positioning accuracy. Concurrently, this research selects the data from 180 IGS stations around the world on September 1st, 2015, to facilitate further positioning experiments. The experimental results reveal that the convergence of traditional PPP to 5 cm takes approximately 20 minutes and 18 minutes respectively for eastward and northward errors, whereas PPP constrained by the refined tropospheric model solely takes 15 minutes and 10 minutes. Additionally, regarding the elevation direction error, the convergence of traditional PPP to 10 cm takes 20 minutes, while that of troposphere-constrained PPP only takes 10 minutes.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rui Zhang, Jiaqi Liu, Kui He, Shuiling Xiong, and Wei Jiang "Research on refinement of the empirical tropospheric models and enhanced precise point positioning", Proc. SPIE 13402, International Conference on Remote Sensing, Mapping, and Geographic Information Systems (RSMG 2024), 134022L (27 November 2024); https://doi.org/10.1117/12.3049095

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KEYWORDS

Atmospheric modeling

Satellites

Receivers

Satellite navigation systems

Laser induced fluorescence

Troposphere

Matrices

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