High-precision ZTD model of altitude-related correction

Q Zhao, J Su, C Xu, Y Yao, X Zhang… - IEEE Journal of Selected …, 2022 - ieeexplore.ieee.org
Zenith tropospheric delay (ZTD) is one of the main error sources in space geodesy. The
existing regional or global models, such as Global Pressure and Temperature 3 (GPT3) …

A global grid model for the correction of the vertical zenith total delay based on a sliding window algorithm

L Huang, G Zhu, L Liu, H Chen, W Jiang - GPS Solutions, 2021 - Springer
Reanalysis products have been applied to calculate the tropospheric delay for Global
Navigation Satellite System (GNSS) positioning purposes widely. It is necessary to obtain …

A high-precision ZTD interpolation method considering large area and height differences

Q Zhao, W Wang, Z Li, Z Du, P Yang, W Yao, Y Yao - GPS Solutions, 2024 - Springer
The existing methods for retrieving high-spatial resolution zenith tropospheric delay (ZTD),
such as interpolation and fitting methods, are not suitable for large areas and large height …

A precipitation forecast model with a neural network and improved GPT3 model for Japan

S Li, N Jiang, T Xu, Y Xu, H Yang, Z Zhang, A Guo… - Gps solutions, 2023 - Springer
Accurate monitoring of atmospheric water vapor content is essential for the early warning of
extreme weather events. As known, GNSS zenith troposphere delay (GNSS_ZTD) is an …

[HTML][HTML] 一种新的高精度全球对流层天顶延迟模型

黄良珂, 陈华, 刘立龙, 姜卫平 - 地球物理学报, 2021 - html.rhhz.net
对流层延迟是影响高精度卫星导航定位的关键因素, 也是大气科学研究的重要数据.
针对已有全球对流层延迟模型的模型方程未同时顾及高程, 纬度和季节变化以及模型构建时仅 …

[HTML][HTML] Improving the estimation of weighted mean temperature in China using machine learning methods

Z Sun, B Zhang, Y Yao - Remote Sensing, 2021 - mdpi.com
As a crucial parameter in estimating precipitable water vapor from tropospheric delay, the
weighted mean temperature (Tm) plays an important role in Global Navigation Satellite …

Global, spatially explicit modelling of zenith wet delay with XGBoost

L Crocetti, M Schartner, F Zus, W Zhang, G Moeller… - Journal of …, 2024 - Springer
Radio signals transmitted by Global Navigation Satellite System (GNSS) satellites
experience tropospheric delays. While the hydrostatic part, referred to as zenith hydrostatic …

A novel modeling strategy of weighted mean temperature in China using RNN and LSTM

W Gao, J Gao, L Yang, M Wang, W Yao - Remote Sensing, 2021 - mdpi.com
In the meteorology of Global Navigation Satellite System, the weighted mean temperature
(Tm) is a key parameter in the process of converting the zenith wetness delay into …

A weighted mean temperature model using principal component analysis for Greenland

S Zhang, L Gong, W Gao, Q Zeng, F Xiao, Z Liu, J Lei - GPS Solutions, 2023 - Springer
The weighted mean temperature (T m) is an important parameter to convert the tropospheric
zenith wet delay (ZWD) extracted from the global navigation satellite system (GNSS) signal …

A new Egyptian Grid Weighted Mean Temperature (EGWMT) model using hourly ERA5 reanalysis data in GNSS PWV retrieval

RE Sleem, MA Abdelfatah, AEK Mousa, GS El-Fiky - Scientific Reports, 2024 - nature.com
Precise modeling of weighted mean temperature (T m) is essential for Global Navigation
Satellite System (GNSS) meteorology. In retrieving precipitable water vapor (PWV) from …