Results 51 to 60 of about 510 (175)

A Novel Robust High‐Precision Ionospheric Delay Modeling for PPP‐RTK Using Crowdsourced Data

Space Weather, Volume 24, Issue 2, February 2026.
Abstract The performance of PPP‐RTK is critically dependent on the quality of ionospheric corrections derived from a reference network. While the proliferation of mass‐market Global Navigation Satellite System (GNSS) devices offers a promising crowdsourcing opportunity to densify or replace this infrastructure, it introduces the formidable challenge of
Bo Wang, Jiaxi Zhu, Zhilu Wu, Dejin Zhang, Zhao Li, Minsi Ao, Shengfeng Gu   +6 more
wiley   +1 more source

Flooding in the Tamanduateí River Hydrographic Basin: A Spatial and Multifactorial Analysis

Transactions in GIS, Volume 30, Issue 1, February 2026.
ABSTRACT Understanding the occurrence of urban floods and their conditioning factors is essential for effective management of urban watersheds. However, few studies have explored the spatial variability of these factors in detail. This study investigates the spatial relationships between conditioning factors and flood occurrences in the Tamanduateí ...
Ítalo Rafael Costa de Mira, Aluizio Brito Maia, Antônio Miguel Vieira Monteiro, Leonardo Bacelar Lima Santos, Camilo Daleles Rennó   +4 more
wiley   +1 more source

Precipitable Water Vapor Retrieval Based on GNSS Data and Its Application in Extreme Rainfall

Remote Sensing
Water vapor plays a crucial role in maintaining global energy balance and water cycle, and it is closely linked to various meteorological disasters. Precipitable water vapor (PWV), as an indicator of variations in atmospheric water vapor content, has ...
Tian Xian, Ke Su, Jushuo Zhang, Huaquan Hu, Haipeng Wang   +4 more
doaj   +1 more source

Impacts of Atmospheric Rivers in Central Greenland: Snowfall, Clouds, and Atmospheric State

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 2, 28 January 2026.
Abstract Atmospheric rivers (ARs) are long bands of strong horizontal water vapor transport responsible for over 90% of total integrated vapor transport (IVT) in extratropical and polar regions. Using a 12‐year record (2010–2022) of ground‐based remote sensing, radiosonde, snow stake, and reanalysis data from Summit Station, Greenland, we quantify the ...
A. E. Wedum, C. Pettersen, H. Guy, M. R. Gallagher, M. D. Shupe, K. S. Mattingly   +5 more
wiley   +1 more source

Analysis of Different Height Correction Models for Tropospheric Delay Grid Products over the Yunnan Mountains

Atmosphere
Accurate tropospheric delays are of great importance for both Global Navigation Satellite System (GNSS)-based positioning and precipitable water vapor monitoring.
Fangrong Zhou, Luohong Li, Yifan Wang, Zelin Dai, Chenchen Ding, Hui Li, Yunbin Yuan   +6 more
doaj   +1 more source

Regional Egypt tropospheric mapping function model

Alexandria Engineering Journal, 2018
It’s essential to find out the delay caused by the troposphere layer to be able to get more accurate results. The precise positioning is very essential for accurate geodetic applications e.g., Crustal deformation and military purposes.
Ahmed Nabil Mohammed, Mohamed Amin Abdelfatah, Ashraf El-Kutb Mousa, Gamal Saber El-Fiky   +3 more
doaj   +1 more source

Global zenith wet delay modeling with surface meteorological data and machine learning

GPS Solutions
AbstractThe tropospheric delay is a major error source for space geodetic techniques, and the performance of its modeling is significantly limited due to the high spatiotemporal variability of the moisture in the lower atmosphere. In this study, global modeling of the tropospheric zenith wet delay (ZWD) was realized based on surface meteorological data
Qinzheng Li, Johannes Böhm, Linguo Yuan, Robert Weber   +3 more
openaire   +1 more source

Climatology of Cloud‐Land‐Surface Coupling Across Different ARM Sites

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 1, 16 January 2026.
Abstract Land‐atmosphere interactions play a critical role in the evolution and formation of low‐level clouds. The different states of coupling between low‐level clouds and the surface are uncertain, primarily over continental regions, where complex thermodynamics complicates their investigation.
Natalia Roldán‐Henao, Tianning Su, Zhanqing Li, Youtong Zheng, John Yorks   +4 more
wiley   +1 more source

A new vertical reduction model for enhancing the interpolation accuracy of VMF1/VMF3 tropospheric delay products [PDF]

Geoscientific Model Development
Grid-wise Vienna Mapping Functions 1 (VMF1) and Vienna Mapping Functions 3 (VMF3) tropospheric products are widely used to interpolate the a priori zenith hydrostatic delay (ZHD) and zenith wet delay (ZWD) over GNSS (Global Navigation Satellite Systems ...
P. Sun, K. Zhang, K. Zhang, D. Zhu, S. Shi, X. Liu, D. Zhao, M. Zhang, S. Wu   +8 more
doaj   +1 more source

Developing a global model for the conversion of zenith wet tropospheric delays to integrated water vapour [PDF]

Acta Geodaetica et Geophysica, 2018
The tropospheric wet delay is a significant systematic error of GNSS positioning, nevertheless it carries important information to meteorologists. It is closely related to the integrated water vapour that is the upper limit of precipitable water. The zenith wet delay can be converted to the integrated water vapour using a simple conversion factor. This
Juni Ildikó, Rózsa Szabolcs
openaire   +2 more sources