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

Model code and software

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

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 %.