Nonlinear Processes in Geophysics
Nonlinear Processes in Geophysics
NPG
Articles | Volume 23, issue 3
Articles | Volume 23, issue 3
https://doi.org/10.5194/npg-23-127-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/npg-23-127-2016
© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 23, issue 3
Research article
 | 
27 May 2016
Research article |  | 27 May 2016

An improved global zenith tropospheric delay model GZTD2 considering diurnal variations

Yibin Yao, Yufeng Hu, Chen Yu, Bao Zhang, and Jianjian Guo

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Short summary
By considering the diurnal variations in zenith tropospheric delay (ZTD) and modifying the model expansion function, we developed an improved global empirical ZTD model GZTD2 with higher temporal and spatial resolutions compared to our previous GZTD model. The external validation testing with IGS ZTD data shows the bias and rms for GZTD2 are −0.3 and 3.9 cm respectively, indicating higher accuracy and reliability for geodesy technology compared to GZTD and other commonly used ZTD models.
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