Results 71 to 80 of about 680,086 (211)

A Tropospheric Zenith Delay Forecasting Model Based on a Long Short-Term Memory Neural Network and Its Impact on Precise Point Positioning

Remote Sensing, 2022
Global navigation satellite system (GNSS) signals are affected by refraction when traveling through the troposphere, which result in tropospheric delay. Generally, the tropospheric delay is estimated as an unknown parameter in GNSS data processing.
Huan Zhang, Yibin Yao, Mingxian Hu, Chaoqian Xu, Xiaoning Su, Defu Che, Wenjie Peng   +6 more
doaj   +1 more source

Statistical description of tropospheric delay for InSAR: Overview and a new model [PDF]

2007 IEEE International Geoscience and Remote Sensing Symposium, 2007
This paper focuses on statistical modeling of water vapor fluctuations for InSAR. The structure function and power spectral density approaches are reviewed, summarizing their assumptions and results. The linking equations between these modeling techniques are reported.
John P. Merryman Boncori, Johan J. Mohr
openaire   +1 more source

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

Perspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki, Michael E. Jackson, Glen S. Mattioli, David J. Mencin, Karl Feaux, Donna J. Charlevoix   +5 more
wiley   +1 more source

Relative roles of climate and emissions changes on future tropospheric oxidant concentrations [PDF]

, 1999
A Lagrangian chemistry-transport model (STOCHEM) was driven with meteorology derived from a slab ocean general circulation model for conditions appropriate to the present-day and at double CO2, and with emission scenarios appropriate for present day ...
Collins, W. J., Stevenson, D. S.; id_orcid, D. S. Stevenson, Derwent, R. G., Johnson, C. E., R. G. Derwent, W. J. Collins, C. E. Johnson   +7 more
core   +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

CNR Ozone Sounding Merged (COSM) Dataset From Existing Global Archives

Geoscience Data Journal, Volume 13, Issue 4, October 2026.
The COSM dataset unifies over 101,000 ozonesonde profiles from SHADOZ, NDACC and WOUDC into a harmonized, quality‐controlled archive spanning 1978–2024. It improves global spatial and temporal coverage, supports climate and chemistry studies, and provides a robust resource for satellite validation, model evaluation and trend analysis.
Fabrizio Marra, Elizabeth C. Weatherhead, Emanuele Tramutola, Marco Rosoldi, Fabio Madonna   +4 more
wiley   +1 more source

More Stabilizing Radiative Feedbacks in CO2 Removal Scenarios

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Recent studies show that global mean surface temperature exhibits a transient hysteresis during CO2 ${\mathrm{C}\mathrm{O}}_{2}$ removal, where temperatures remain elevated after CO2 ${\mathrm{C}\mathrm{O}}_{2}$ concentrations return to pre‐industrial levels.
Ivan Mitevski, Gabriel A. Vecchi
wiley   +1 more source

Quantitative analysis of the tropospheric delay difference using empirical mapping functions on VLBI stations

Frontiers in Astronomy and Space Sciences
Tropospheric delay is a major error source for the high-accuracy Very Long Baseline Interferometry (VLBI) technique due to rapid water vapor variations. The Niell mapping function (NMF) and Global Mapping Function (GMF) are extensively applied to convert
W. L. Zhou, W. L. Zhou, W. L. Zhou, W. L. Zhou, S. L. Song, S. L. Song, J. Jiang, J. Jiang, X. Hu, P. J. Li, P. J. Li, Z. B. Zhang, Z. B. Zhang, Z. B. Zhang   +13 more
doaj   +1 more source

The Role of Tectonic Inheritance in Active Rift Seismicity and Magmatism: Constraints From 3‐D Gravity Inversion and D‐InSAR Modeling of the 2025 Fentale Swarm, Ethiopia

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract The role of inherited lithospheric structures in active rift seismicity and magma intrusion remains a key uncertainty in continental breakup dynamics. We investigate the January 2025 Northern Main Ethiopian Rift swarm using constrained 3‐D gravity inversion and D‐InSAR observations to characterize crustal architecture, seismicity, and active ...
Denberu Besfat, Tilahun Mammo
wiley   +1 more source

Aseismic Slip Along the Evaporite‐Rich Strike‐Slip Katouna‐Stamna Fault in Greece

Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.
Abstract Aseismic slip has been observed on many active faults globally, but its controlling mechanisms remain unclear. This study focuses on the NW‐striking, left‐lateral Katouna‐Stamna Fault in Western Greece. We use InSAR surface deformation measurements to confirm the presence of aseismic slip and compare this behavior with structural evidence from
Joel Szrek, Silvia Crosetto, Sabrina Metzger, Giorgio Gomba, Claudio Faccenna, Romain Jolivet   +5 more
wiley   +1 more source