Articles | Volume 16, issue 24
https://doi.org/10.5194/gmd-16-7223-2023
https://doi.org/10.5194/gmd-16-7223-2023
Model experiment description paper
 | 
14 Dec 2023
Model experiment description paper |  | 14 Dec 2023

A global grid model for the estimation of zenith tropospheric delay considering the variations at different altitudes

Liangke Huang, Shengwei Lan, Ge Zhu, Fade Chen, Junyu Li, and Lilong Liu

Related authors

A hybrid-grid global model for the estimation of atmospheric weighted mean temperature considering time-varying vertical adjustment rate in GNSS precipitable water vapour retrieval
Shaofeng Xie, Jihong Zhang, Liangke Huang, Fade Chen, Yongfeng Wu, Yijie Wang, and Lilong Liu
Geosci. Model Dev., 18, 6987–7002, https://doi.org/10.5194/gmd-18-6987-2025,https://doi.org/10.5194/gmd-18-6987-2025, 2025
Short summary
A grid model for vertical correction of precipitable water vapor over the Chinese mainland and surrounding areas using random forest
Junyu Li, Yuxin Wang, Lilong Liu, Yibin Yao, Liangke Huang, and Feijuan Li
Geosci. Model Dev., 17, 2569–2581, https://doi.org/10.5194/gmd-17-2569-2024,https://doi.org/10.5194/gmd-17-2569-2024, 2024
Short summary

Cited articles

Black, H. D.: An easily implemented algorithm for the tropospheric range correction, J. Geophys. Res., 83, 1825–1828, https://doi.org/10.1029/JB083iB04p01825, 1978. 
Böhm, J., Heinkelmann, R., and Schuh, H.: Short note: A global model of pressure and temperature for geodetic applications, J. Geodesy, 81, 679–683, https://doi.org/10.1007/s00190-007-0135-3, 2007. 
Böhm, J., Möller, G., Schindelegger, M., Pain, G., and Weber, R.: Development of an improved blind model for slant delays in the troposphere (GPT2w), GPS Solut., 19, 433–441, https://doi.org/10.1007/s10291-014-0403-7, 2015. 
Bonafoni, S., Biondi, R., Brenot, H., and Anthes, R.: Radio occultation and ground-based GNSS products for observing, understanding and predicting extreme events: A review, Atmos. Res., 230, 104624, https://doi.org/10.1016/j.atmosres.2019.104624, 2019. 
Chen, B. Y., Yu, W. K., Wang, W., Zhang, Z. T., and Dai, W. J.: A Global Assessment of Precipitable Water Vapor Derived From GNSS Zenith Tropospheric Delays With ERA5, NCEP FNL, and NCEP GFS Products, Earth and Space Science, 8, e2021EA001796, https://doi.org/10.1029/2021EA001796, 2021. 
Download
Short summary
The existing zenith tropospheric delay (ZTD) models have limitations such as using a single fitting function, neglecting daily cycle variations, and relying on only one resolution grid data point for modeling. This model considers the daily cycle variation and latitude factor of ZTD, using the sliding window algorithm based on ERA5 atmospheric reanalysis data. The ZTD data from 545 radiosonde stations and MERRA-2 atmospheric reanalysis data are used to validate the accuracy of the GGZTD-P model.
Share