Results 61 to 70 of about 409 (165)

Variability of GPS-derived zenith tropospheric delay and some result of its assimilation into numeric atmosphere model [PDF]

, 2012
The total zenith tropospheric delay (ZTD) is an important parameter of the atmo- sphere and directly or indirectly reflects the weather processes and variations.
Khutorova O., Khutorov V., Kalinnikov V., Kurbangaliev T., Teptin G.   +4 more
core  

A Novel Enhancement of the MIMIC Remote Sensing Water Vapor Product and Its Application in GNSS Positioning

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Tropospheric delay plays a crucial role in global navigation satellite systems (GNSS) positioning, climate monitoring, and weather forecasting. In particular, in high-precision GNSS applications such as precise point positioning (PPP), prior tropospheric
Ranran Jia, Yan Xu, Nan Jiang, Zeqi Li, Tianhe Xu, Harald Schuh   +5 more
doaj   +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

Accuracy Assessment and Rainfall Intensity Response Mechanisms in GNSS Real‐Time PPP Water Vapor Retrieval: Coupling Effects of Multi‐Source Real‐Time Products and Meteorological Conditions

Earth and Space Science, Volume 12, Issue 9, September 2025.
Abstract The Global Navigation Satellite System (GNSS) real‐time Precise Point Positioning (PPP) technology offers a highly efficient approach for atmospheric Precipitable Water Vapor (PWV) monitoring and extreme weather warning. However, its retrieval accuracy is limited by the performance of orbit and clock products, as well as the coupling effects ...
Wenliang Gao, Guigen Nie, Yu Guo, Jiaqi Shi, Shuguang Wu   +4 more
wiley   +1 more source

Optimizing PPP Performance by Incorporating ZWD Constraints Derived From Data Assimilation

Earth and Space Science, Volume 12, Issue 8, August 2025.
Abstract One of the primary error sources limiting the performance of the Precise Point Positioning (PPP) technique is the atmospheric wet delay, caused by the presence of water vapor in the lower atmosphere. Accurately representing this parameter is crucial for improving the initialization and accuracy of satellite‐based positioning techniques ...
Masoud Dehvari, Saeed Farzaneh, Ehsan Forootan   +2 more
wiley   +1 more source

GPS-Derived zenith tropospheric delay assimilation into numeric atmosphere model

, 2020
© 2014 SPIE. The total zenith tropospheric delay (ZTD) is an important parameter of the atmosphere and directly or indirectly reflects the weather processes and variations.
Khutorova O., Khutorov V., Jouravlev A., Krasnov V.   +3 more
core  

Correcting Non‐Tidal Atmospheric and Oceanic Loading Displacements at the Observation, Normal Equation, and Parameter Levels in GNSS Data Analysis

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.
Abstract Non‐tidal loading (NTL) introduces surface deformation on the Earth and increases the variability in coordinates measured by space geodetic techniques. Correcting NTL displacements in Global Navigation Satellite Systems (GNSS) analysis has been discussed extensively, commonly at the parameter level.
Jungang Wang, Kyriakos Balidakis, Henryk Dobslaw, Benjamin Männel, Maorong Ge, Robert Heinkelmann, Harald Schuh   +6 more
wiley   +1 more source

4DVAR assimilation of GNSS zenith path delays and precipitable water into a numerical weather prediction model WRF [PDF]

Atmospheric Measurement Techniques, 2019
The GNSS data assimilation is currently widely discussed in the literature with respect to the various applications for meteorology and numerical weather models.
W. Rohm, J. Guzikowski, K. Wilgan, K. Wilgan, M. Kryza   +4 more
doaj   +1 more source

Benefits of GNSS Local Observations Compared to Global Weather‐Based Models for InSAR Tropospheric Corrections Over Tropical Volcanoes: Case Studies of Piton De La Fournaise and Merapi

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract From repeat‐pass interferometry, tropospheric signals often prevent the detection of ground deformation signals. In recent years, tropospheric corrections derived from global weather‐based models have been implemented in several InSAR processing chains.
F. Albino, S. Gremion, V. Pinel, P. Bouygues, A. Peltier, F. Beauducel, J.‐L. Froger, Agus Budi Santoso   +7 more
wiley   +1 more source

Deep Learning Approaches for Zenith Total Delay Estimation

Zenith Total Delay (ZTD) is a crucial parameter for understanding the effects of atmospheric conditions on satellite signals, constituting a fundamental aspect of precision positioning and atmospheric modeling applications.
Bak, Mehmet, Tekin Ünlütürk, Nihal
core   +1 more source