Geoscientific Model Development
Geoscientific Model Development
GMD
Articles | Volume 16, issue 4
Articles | Volume 16, issue 4
https://doi.org/10.5194/gmd-16-1345-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-16-1345-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 16, issue 4
Development and technical paper
 | 
24 Feb 2023
Development and technical paper |  | 24 Feb 2023

Analysis of systematic biases in tropospheric hydrostatic delay models and construction of a correction model

Haopeng Fan, Siran Li, Zhongmiao Sun, Guorui Xiao, Xinxing Li, and Xiaogang Liu

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Latest update: 03 Nov 2025
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Short summary
The traditional tropospheric zenith hydrostatic delay (ZHD) model's bias is usually thought negligible, yet it still reaches 10 mm sometimes and would lead to millimeter-level position errors for space geodetic observations. Therefore, we analyzed the bias’ characteristics and present a grid model to correct the traditional ZHD formula. When verifying the efficiency based on data from the ECMWF (European Centre for Medium-Range Weather Forecasts), ZHD biases were rectified by ~50 %.
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