Results 41 to 50 of about 732,269 (162)

Zenith Tropospheric Delay Forecasting in the European Region Using the Informer–Long Short-Term Memory Networks Hybrid Prediction Model

Atmosphere
Zenith tropospheric delay (ZTD) is a significant atmospheric error that impacts the Global Navigation Satellite System (GNSS). Developing a high-precision, long-term forecasting model for ZTD can provide valuable insights into the overall trends of ...
Zhengdao Yuan, Xu Lin, Yashi Xu, Jie Zhao, Nage Du, Xiaolong Cai, Mengkui Li   +6 more
doaj   +1 more source

A comprehensive comparison of atmospheric mapping functions for GPS measurements in Egypt

Journal of Geodetic Science, 2012
The principal limiting error source in the Global Positioning System (GPS) is the mismodeling of the delay experienced by radio waves in propagating through the atmosphere.
Younes S. A., Elmezayen A. G.
doaj   +1 more source

Estimating Zenith Tropospheric Delay Based on GPT2w Model

IEEE Access, 2019
To precisely and conveniently estimate zenith tropospheric delay (ZTD), troposphere refractivity is deduced through global pressure and temperature 2w (GPT2w) model and surface meteorology devices, ZTD is estimated based on integration of refractivity in
Zan Liu, Xihong Chen, Qiang Liu
doaj   +1 more source

Analysis of accuracy and precision of GNSS zenith tropospheric delay [PDF]

, 2016
The aim of the thesis was to compare the calculations of zenith tropospheric delay, computed within the meteorological model, with an independently acquired calculation of three GNSS data processing methods.
Bohanec, Jure
core  

Impact of GNSS zenith total delay assimilation on the numerical weather model tropospheric delay parameters

, 2023
In the GNSS analysis the signal travel time delay induced by the neutral atmosphere is parameterized. The related parameters are derived from a climatology or better yet from a Numerical Weather Model (NWM). Current thinking is that NWMs are not accurate
Zus, Florian, Dick, Galina, Thundathil, Rohith, Wickert, Jens, Doğan, Ali Hasan   +4 more
core   +1 more source

The Wessex Convection Experiment (WesCon)–Observing the Evolving Structures of Turbulence (WOEST): Coordinated Aircraft and Ground‐Based Observations of Turbulence and Convection in Southwest England During Summer 2023

Geoscience Data Journal, Volume 13, Issue 4, October 2026.
This paper summarises a coordinated field campaign in southern England in summer 2023 as part of the ParaChute programme, which studied atmospheric turbulence to improve weather and climate models. The field campaign used ground‐based instruments, aircraft and drones to observe turbulence and storms, creating datasets to develop better turbulence ...
Sarah L. Barr, Ryan R. Neely III, David M. Schultz, Thorwald H. M. Stein, Steven J. Abel, Michael Baidu, Paul A. Barrett, Lindsay J. B. Rhodes, Jake Bland, Timothy Darlington, Edward Gryspeerdt, Natalie J. Harvey, Humphrey W. Lean, Chun Hay Brian Lo, Aoife McQuaid, Emily G. Norton, Simon R. Osborne, Ben S. Pickering, Philip Rosenberg, Hugo M. Ricketts, Joseph Robinson, Robert J. Thompson, Christopher J. Walden, Freya I. Addison, Jennifer K. Brooke, Peter Clark, Ronald Clark, Martin I. Daily, Alex Fearn, Polly B. Foster, Suzanne L. Gray, James Groves, Kirsty E. Hanley, Amanda Kerr‐Munslow, Jona Keimer, Martin Kumm, Justin M. Langridge, Jacob Lin, Laurents R. R. Marker, James R. McGregor, Heather Moore, Benjamin J. Murray, Jeremy D. Price, Alexander J. Roberts, Robert W. Scovell, Jens Wellhausen, Alison J. Stirling   +46 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

Removing the Effect of Source Structure From Correlated VLBI Data

Radio Science, Volume 61, Issue 10, October 2026.
Abstract Recent studies suggest that in geodetic very long baseline interferometry (VLBI) the assumption of sources being point‐like results in a significant residual error introduced by the effect of source structure. Our aim is to remove the impact of source structure from geodetic VLBI data right after the correlation step. For this purpose, we have
Frédéric Jaron, Víctor Pérez‐Díez, Hana Krásná, Johannes Böhm, Patrick Charlot, Arnaud Collioud, Jakob Gruber, Iván Martí‐Vidal, Axel Nothnagel   +8 more
wiley   +1 more source

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  

Strategies for Mitigating the Impact of Ionospheric and Tropospheric Delay on Sentinel‐1 Interferograms in Northwestern Argentina

Earth and Space Science, Volume 13, Issue 10, October 2026.
Abstract This study investigates the impact and mitigation of ionospheric and tropospheric delays on Sentinel‐1 interferograms in northwestern Argentina. The research focuses on the Santa María Basin in the south‐central Andes, a region characterized by moderate seismic deformation, monsoonal moisture supply, a steep east‐west rainfall gradient, and ...
Sofia Viotto, Bodo Bookhagen
wiley   +1 more source