Articles | Volume 37, issue 1
Ann. Geophys., 37, 89–100, 2019
https://doi.org/10.5194/angeo-37-89-2019

Special issue: Advanced Global Navigation Satellite Systems tropospheric...

Ann. Geophys., 37, 89–100, 2019
https://doi.org/10.5194/angeo-37-89-2019

Regular paper 01 Feb 2019

Regular paper | 01 Feb 2019

An improved pixel-based water vapor tomography model

Yibin Yao et al.

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Latest update: 01 Mar 2021
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Short summary
In this paper, we propose an improved pixel-based water vapor tomography model, which uses layered optimal polynomial functions by adaptive training for water vapor retrieval. Under different scenarios, tomography results show that the new model outperforms the traditional one by reducing the root-mean-square error (RMSE), and this improvement is more pronounced, at 5.88 % in voxels without the penetration of GNSS rays. The improved model also has advantages in more convenient expression.