Results 51 to 60 of about 749,960 (137)

Selecting ERA5 Grid Spacing for GNSS Tropospheric Parameters over China

Atmosphere
ERA5 is the fifth-generation atmospheric reanalysis from the European Centre for Medium-Range Weather Forecasts. It combines observations with a weather model to reconstruct past atmospheric conditions.
Ziyang Ding, Chao Liu, Zihan Peng, Clement Chongo, James Ngoma   +4 more
doaj   +1 more source

Impact of a priori zenith hydrostatic delay errors on GPS estimates of station heights and zenith total delays [PDF]

, 2015
Corrections to zenith atmospheric delays (including hydrostatic components) are estimated in geodetic analyses using partial derivatives that relate wet delays to the phase observations.
Tregoning, Paul, Herring, T A
core   +1 more source

Continental‐Scale Validation of VMF3‐ and ERA5‐Derived Precipitable Water Vapour Against Ground‐Based GNSS Observations Across Africa

Advances in Meteorology, Volume 2026, Issue 1, 2026.
Accurate precipitable water vapour (PWV) estimates are essential for weather forecasting, climate monitoring, and hydrological applications, particularly across observation‐sparse regions. This study presents a continental‐scale validation of PWV derived from the Vienna Mapping Function 3 (VMF3) tropospheric products and the fifth‐generation ECMWF ...
Samuel Osah, Akwasi A. Acheampong, Samuel A. Andam-Akorful, Samuel B. Asiedu, Charles Gameti, Rohith M. Thundathil, Benjamin Dadson, Thomas B. Botchwey, Osman M. Abukari, Yaw Poku-Gyamfi, Justine Kojo, Jonathan A. Quaye-Ballard, Collins Fosu, Isaac Dadzie, Smritijit Sen   +14 more
wiley   +1 more source

Zenith wet delay retrieval using two different techniques for the South American region and their comparison [PDF]

, 2021
Retrieving atmospheric water vapor content using GNSS claimed the attention of the geodetic community ever since the beginning of the GPS deployment. The main purpose of the present work is to propose a comparison of the Zenith Wet Delay (ZWD) retrieved ...
Crespi, Mattia, Brunini, Claudio Antonio, Azpilicueta, Francisco Javier, Calori, A., Colosimo, G., Mackern, M. V., Gende, Mauricio Alfredo, Rizos, Chris, Willis, Pascal   +8 more
core  

Accuracy assessment of reanalysis datasets for GPS-PWV estimation using Indian IGS stations observations

, 2022
GPS PWV (Precipitable Water Vapour) is estimated using three years ECMWF, JRA55, MERRA2, and NCEP datasets for two IGS stations HYDE and IISC in India to assess their accuracies over the Indian region.
Ashutosh Srivastava
core   +1 more source

Atmospheric Water Vapor and Precipitation Coupling in Southwestern South America

Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.
Abstract Most studies linking atmospheric water vapor and precipitation emphasize short records, tropical regions, or the Northern Hemisphere. Long‐term variability of water vapor and its coupling with precipitation remain poorly understood across strong latitudinal and climatic gradients.
Raúl Valenzuela, Jorge Jara, Cristian Martinez‐Villalobos   +2 more
wiley   +1 more source

Tropospheric Propagation Effects Extracted From ADS‐B Messages

Engineering Reports, Volume 7, Issue 12, December 2025.
This study explores the use of ADS‐B messages to estimate tropospheric effects, effectively isolating atmospheric influences from interference. The approach enables independent lower atmosphere studies and offers a cost‐free supplementary method for satellite applications, benefiting GNSS systems, especially at low elevation angles where multipath and ...
Alina‐Mihaela Badescu
wiley   +1 more source

AGFS: a two-step real-time tropospheric delay model by integrating GNSS, ERA5, and GFS

Geo-spatial Information Science
Tropospheric delay is a major error source in high-precision positioning with global navigation satellite systems (GNSS). However, accurately modeling tropospheric delay remains challenging, particularly for real-time applications in regions with sparse ...
Zhilu Wu, Yang Yu, Bofeng Li, Miaomiao Wang   +3 more
doaj   +1 more source

Research on Applicability of GNSS PWV Data in Northeast China and Its Application in Intelligent Precipitation Prediction

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract Atmospheric water vapor is an important factor in the formation and evolution of extreme weather events, such as heavy rainfall, typhoons, and major droughts and floods. We analyzed the applicability of precipitable water vapor (PWV) values from the Global Navigation Satellite System Meteorology (GNSS/MET) stations in northeastern China.
Yang Liu, Gen Wang, Tiening Zhang, Ping Wang, Bing Xu, Jinyi Xia   +5 more
wiley   +1 more source

Analysis of the Synergistic Effect of Water Vapor, Thermodynamics, and Dynamics of the Heavy Rainfall Over Henan Province, China in July 2021

Meteorological Applications, Volume 32, Issue 5, September/October 2025.
In this study, a record‐breaking rainfall is analyzed based on the observation data and reanalysis data. The overlay of precipitation provided by both dynamic delivery from the southeast and cloud microphysical production over Zhengzhou was the main cause of the rainfall under the background of an atypical weak environmental field. ABSTRACT During July
Yang Yu, Rong Wan, Zhikang Fu
wiley   +1 more source