Results 51 to 60 of about 474,530 (188)

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

Determination of Earth's Static Gravity Field Using Quantum Gravity Satellites at Very Low Earth Orbit

Earth and Space Science, Volume 13, Issue 10, October 2026.
Abstract Very Low Earth Orbit (VLEO) satellite platforms and quantum‐optical sensing technologies may provide new observation approaches for improving Earth's static gravity field models. This study conceptually assesses their potential contribution through a two‐tier closed‐loop simulation framework.
Wenming Chen, Hao Zhou, Yanbin Zhao, Zhu Zhu, Shuyun Zheng, Zhicai Luo, Zebing Zhou   +6 more
wiley   +1 more source

Equatorial F‐Region Responses to the Main Phase of the 10 May 2024 Geomagnetic Storm Over the South American Sector: Observations and Model Simulations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This study examines the equatorial ionospheric response over the South American sector during the onset of the extreme 2024 Mother's Day geomagnetic storm, which began at ∼17 UT on 10 May and reached the G5 level. Pronounced disturbances in ionospheric electrodynamics were observed under both daytime and nighttime conditions. Variations in the
A. M. Santos, J. R. Souza, I. S. Batista, M. Bravo, C. G. M. Brum, J. H. A. Sobral, S. S. Chen, R. Sá, L. C. A. Resende, J. Moro, P. R. Jauer, L. da Silva, D. Medeiros, P. A. B. Nogueira, E. A. Kherani, V. F. Andrioli, M. A. Abdu, G. S. Adeniran, R. de Jesus, A. A. Pimenta, G. Yang, F. A. de Souza   +21 more
wiley   +1 more source

Coupled Thermosphere–Ionosphere–Plasmasphere Disturbances During the April 2023 Geomagnetic Storm: A Ground‐Based Multiparametric Study Across the American and European Sectors

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract The April 2023 geomagnetic storm significantly impacted the thermosphere‐ionosphere system, particularly over South America and midlatitude regions. This study analyzes ground‐based geomagnetic and ionospheric data, alongside Swarm satellite measurements, to investigate the physical mechanisms driven by intense solar wind energy input ...
L. Perrone, M. Regi, G. Carnevale, C. Scotto, D. Sabbagh, A. Ippolito, A. Del Corpo, D. Sciarra, B. Heilig   +8 more
wiley   +1 more source

Morphological Characteristics of Equatorial Ionization Anomaly Crest Over Nanning Region [PDF]

Radio Science, 2018
AbstractUsing the ionospheric total electron content (TEC) and the location of the equatorial ionization anomaly (EIA) crest derived from GPS data observed at Nanning (22.84°N, 108.33°E, dip latitude ~ 12.14°N), China, a GPS station situated near the daytime EIA crest region, the local time, seasonal, and solar cycle variations of EIA crests from 2006 ...
X. H. Mo, D. H. Zhang, J. Liu, Y. Q. Hao, J. F. Ye, J. S. Qin, W. X. Wei, Z. Xiao   +7 more
openaire   +1 more source

Analyzing the Influence of Saint Patrick’s Day Geomagnetic Storm on the Maximum Usable Frequency (MUF) in the Brazilian Equatorial and Low-Latitude Ionosphere

Atmosphere
The variation in the maximum usable frequency (MUF) during geomagnetic disturbances is a key parameter for high-frequency (HF) radio communications. This study investigates MUF variability and related ionospheric parameters during the first geomagnetic ...
Onyinye G. Nwankwo, Fabio Becker-Guedes, Claudia M. N. Candido   +2 more
doaj   +1 more source

Space weather impact on the equatorial and low latitude F-region ionosphere over India [PDF]

Annales Geophysicae, 2006
For a detailed study of the space weather impact on the equatorial and low latitude F-region, the ionospheric response features are analysed during the periods of three recent and most severe magnetic storm events of the present solar cycle which ...
R. S. Dabas, R. M. Das, V. K. Vohra, C. V. Devasia   +3 more
doaj   +1 more source

A Time‐Continuous Model of the 3D Ionospheric Current System and Associated Magnetic Fields in the Diurnal Variation Band

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Ionospheric currents and their associated magnetic perturbations are difficult to predict due to the high variability of their driving mechanisms. In addition, the 3D structure of the currents is challenging to unravel due to the lack of direct observations within the current flow region, particularly in the E $E$‐layer.
P. Alken, G. D. Egbert, A. Maute, A. D. Richmond, G. Lu, K. Pham, M. Fillion   +6 more
wiley   +1 more source

Daily Dynamo Electric Fields Derived by Using Equatorial Ionization Anomaly Crests of the Total Electron Content

, 2022
Latitudinal distances between the two equatorial ionization anomaly (EIA) crests in total electron content (TEC) of global ionosphere map (GIM) are used to derive the daily dynamo eastward electric field by comparing the eastward electric field ...
Charles C. H. Lin, Jann‐Yenq Liu, Ching‐Chung Cheng, Yin‐Chen Cheng   +3 more
core   +1 more source

An investigation of the ionospheric F region near the EIA crest in India using OI 777.4 and 630.0 nm nightglow observations [PDF]

Annales Geophysicae, 2018
Simultaneous observations of OI 777.4 and OI 630.0 nm nightglow emissions were carried at a low-latitude station, Allahabad (25.5° N, 81.9° E; geomag. lat.
N. Parihar, S. M. Radicella, B. Nava, Y. O. Migoya-Orue, P. Tiwari, R. Singh   +5 more
doaj   +1 more source