Results 51 to 60 of about 5,886 (223)

Development of a High-Resolution Tropospheric Delay Model Integrating GNSS ZTD and ERA5 Reanalysis

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Tropospheric delay is a key metric in weather monitoring and represents one of the primary error sources in precise positioning. Advances in Global Navigation Satellite System (GNSS) and numerical weather models (NWM) present significant potential for ...
Cuixian Lu, Bo He, Yuxin Zheng, Jiafeng Li, Xuanzhen Zhang   +4 more
semanticscholar   +1 more source

Accuracy Evaluation and Analysis of GNSS Tropospheric Delay Inversion from Meteorological Reanalysis Data

Remote Sensing, 2022
Accurate estimation of tropospheric delay is significant for global navigation satellite system’s (GNSS) high-precision navigation and positioning. However, due to the random and contingent changes in weather conditions and water vapor factors, the ...
Guolin Liu, Guanwen Huang, Ying Xu, Liangyu Ta, Ce Jing, Yu Cao, Ziwei Wang   +6 more
doaj   +1 more source

Using ground-based GPS to characterize atmospheric turbulence [PDF]

, 2009
A new method for measuring and studying atmospheric turbulence is presented. The method uses data from a local network of GPS receivers. The GPS data are processed in a way that assures that the estimated zenith total delays (ZTD) contain the effects of ...
Davis, J.L., Hill, E.M., Nilsson, Tobias
core   +1 more source

SHAtropE—A Regional Gridded ZTD Model for China and the Surrounding Areas

Remote Sensing, 2020
A regional zenith tropospheric delay (ZTD) empirical model, referred to as SHAtropE (SHanghai Astronomical observatory tropospheric delay model—Extended), is developed and provides tropospheric propagation delay corrections for users in China and ...
Junping Chen, Jungang Wang, Ahao Wang, Junsheng Ding, Yize Zhang   +4 more
doaj   +1 more source

The uncertainty of the atmospheric integrated water vapour estimated from GNSS observations [PDF]

, 2016
Within the Global Climate Observing System (GCOS) Reference Upper-Air Network (GRUAN) there is a need for an assessment of the uncertainty in the integrated water vapour (IWV) in the atmosphere estimated from ground-based global navigation satellite ...
Bradke, M, Dick, G, Elgered, Gunnar, Ning, Tong, Querel, R, Smale, D., Sommer, M, Wang, J, Wickert, J   +8 more
core   +2 more sources

Improved Zenith Tropospheric Delay Modeling Using the Piecewise Model of Atmospheric Refractivity

Remote Sensing, 2020
As one of the atmosphere propagation delays, the tropospheric delay is a significant error source that should be properly handled in high-precision global navigation satellite system (GNSS) applications.
Liu Yang, Jingxiang Gao, Dantong Zhu, Nanshan Zheng, Zengke Li   +4 more
doaj   +1 more source

A Window‐Augmented Machine Learning Approach for Direct GNSS Precipitable Water Vapor Retrieval

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract Global Navigation Satellite Systems (GNSS) provide an effective means for remote sensing of precipitable water vapor (PWV). However, conventional GNSS‐based PWV retrieval approaches rely heavily on auxiliary meteorological parameters, which are frequently unavailable in real time, while most direct retrieval methods use station data aggregated
Zhouao Zheng, Haoyu Wang, Liangke Huang, Ziwei Li, Haojun Li, Hongxing Zhang, Junyu Li, Lilong Liu   +7 more
wiley   +1 more source

Regression models for predicting daily IGS zenith tropospheric delays in West Africa: Implication for GNSS meteorology and positioning applications

Meteorological Applications, 2021
The ability to precisely and accurately model and predict tropospheric delay is essential for precise global navigation satellite system (GNSS) and meteorological applications.
Samuel Osah, Akwasi A. Acheampong, Collins Fosu, Isaac Dadzie   +3 more
doaj   +1 more source

Estimation and Evaluation of Zenith Tropospheric Delay from Single and Multiple GNSS Observations

Remote Sensing, 2023
Multi-Global Navigation Satellite Systems (multi-GNSS) (including GPS, BDS, Galileo, and GLONASS) provide a significant opportunity for high-quality zenith tropospheric delay estimation and its applications in meteorology.
Sai Xia, Shuanggen Jin, Xuzhan Jin
doaj   +1 more source

A GPS network for tropospheric tomography in the framework of the Mediterranean hydrometeorological observatory Cévennes-Vivarais (south-eastern France) [PDF]

, 2014
International audienceThe Mediterranean hydrometeorological observatory Cévennes-Vivarais (OHM-CV) coordinates hydrometeorological observations (radars, rain gauges, water level stations) on a regional scale in southeastern France.
Brenot, Hugues, Champollion, Cedric, Collard, Philippe, Doerflinger, Erik, Ducrocq, Véronique, Giroux, Pierre, Masson, Frédéric, Reverdy, Mathieu, van Baelen, Joël, Walpersdorf, Andrea   +9 more
core   +4 more sources