Results 51 to 60 of about 89,788 (206)

Coupled Thermosphere–Ionosphere Dynamics During the 17 January 2013 Storm: GITM–TIDAS Comparison With Millstone Hill ISR Measurements

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract This article analyzes a weak geomagnetic storm on January 17–18, 2013, using a first‐principles model (Global Ionosphere Thermosphere Model (GITM) with an empirical assimilative ionospheric model (TIDAS), evaluated against observations in the form of Millstone Hill (MH) incoherent scatter radar (ISR) altitude profiles and global navigation ...
Onyinye Nwankwo‐Omoloja, Aaron J. Ridley, Shun‐Rong Zhang, Philip J. Erickson   +3 more
wiley   +1 more source

Analysis of the Ionospheric Irregularities and Phase Scintillation at Low and Middle Latitudes Based on Swarm Observations

Remote Sensing, 2022
This study presents a statistical analysis of the ionospheric irregularities and topside ionospheric scintillation at low and middle latitudes by using in situ electron density and upward-looking total electron content data measured by the Swarm ...
Jiawei Kuai, Kang Wang, Jiahao Zhong, Xin Wan, Fuqing Huang, Hao Sun, Jiawen Chen, Xingyan Song, Hao Han   +8 more
doaj   +1 more source

Characterization of High‐Frequency GNSS Total Electron Content Variations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Global Navigation Satellite System (GNSS)–derived Total Electron Content (TEC) is widely used to investigate ionospheric variability, but has primarily been applied to low‐frequency fluctuations. Here we present a long‐term statistical characterization of high‐frequency (30–500 mHz) TEC variations using multi‐constellation GNSS data from 11 ...
J. Pérez‐Coll Jiménez, N. Ivchenko, N. Partamies, M. Håkansson   +3 more
wiley   +1 more source

Magnetic storm effect on the occurrence of ionospheric irregularities at an equatorial station in the African sector

Annals of Geophysics, 2014
Large-scale ionospheric irregularities usually measured by GPS TEC fluctuation indices are regular occurrence at the equatorial region shortly after sunset around solar maximum. Magnetic storm can trigger or inhibit the generation of these irregularities
Olushola Abel Oladipo, Torben Schüler
doaj   +1 more source

Statistics of Orientation of Nightside Auroral Arcs and Interplanetary Conditions

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract We present statistics and dependence on interplanetary conditions of the orientation of nightside auroral arcs in the equatorward part of the auroral oval. The results related to the arcs essentially represent the orientation and dynamics of the equatorial boundary of the nightside auroral oval.
A. Kozlovsky, M. Myllymaa, R. Lukianova, T. Raita   +3 more
wiley   +1 more source

Some Aspects of Ionospheric Irregularities [PDF]

, 1976
123-130Faraday fading of 40 MHz transmissions from the satellite Explorer-27 recorded at Kurukshetra and Delhi during Oct. 1970-May 1972 has been utilized for the study of ionospheric irregularities.
Dutta, H N, Somayajulu, Y V, Lal, J B
core  

Convection Velocity Covariance Estimated From SuperDARN Observations

Journal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract An examination of the spatial covariance of the high‐latitude plasma convection velocity is presented. The covariance was calculated from patterns of plasma convection estimated from Super Dual Auroral Radar Network observations. The convection patterns were calculated on a magnetic latitude—magnetic local time grid from 55° ${}^{\circ}$ to 88.
W. A. Bristow, M. F. Wilcox
wiley   +1 more source

Variation of Global Ionospheric Scintillation and Its Effect on GPS Kinematic PPP‐AR Performance During Geomagnetic Storms in Solar Cycle 25: A Statistical Analysis

Space Weather, Volume 24, Issue 10, October 2026.
Abstract Enhanced small‐scale ionospheric irregularities during geomagnetic storms can disturb Global Navigation Satellite System (GNSS) carrier‐phase tracking and are associated with reduced stability of ambiguity‐fixed precise point positioning (PPP‐AR), but their impact on kinematic positioning remains insufficiently quantified.
Dongsheng Zhao, Qichen Zhao, Shuanglei Cui, Kefei Zhang, Longjiang Li, Wang Li, Zhongchao Shi, Craig M. Hancock   +7 more
wiley   +1 more source

Ionospheric Mechanisms Leading to Plasma‐Bubble Zonal Drift Reversal and Deformation During the 12 November 2025 Geomagnetic Storm

Space Weather, Volume 24, Issue 10, October 2026.
Abstract We present a multi‐instrument analysis of the ionospheric response to the intense geomagnetic storm of 12 November 2025 over the American sector, with emphasis on the longitudinally asymmetric deformation, latitudinal expansion, and zonal drift reversal of equatorial plasma bubbles (EPBs).
G. A. S. Picanço, I. Galkin, P. Song, E. Astafyeva, L. C. A. Resende, J. P. Marchezi, L. A. da Silva, P. R. Fagundes, C. M. Denardini, C. Martinis, A. M. Santos, V. G. Pillat, A. J. Coster, A. L. Christovam, S. R. Laranja, M. A. M. Lopes   +15 more
wiley   +1 more source

Statistical Study on the Effect of Meridional Neutral Wind on the Occurrence of Post‐Sunset Equatorial Ionospheric Irregularities

Space Weather
The navigation and radio communication systems experience significant disruptions due to post‐sunset equatorial ionospheric irregularities. There is ongoing debate regarding the impact of meridional/trans‐equatorial wind speed on these irregularities ...
Bantayehu Aderaw, Melessew Nigussie
doaj   +1 more source