Results 61 to 70 of about 184,127 (275)

Direct Observational Evidence of the Mesoscale Gravity Wave Modulations on Low‐Latitude Sporadic E Layer

open access: yesGeophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Sporadic E (Es) layer plays essential role in ionosphere‐atmosphere coupling. Theoretical simulations show that the atmospheric gravity waves (GWs) in the lower thermosphere are the main modulatory source on Es dynamics at small spatial scales and short periods.
Junyi Wang   +9 more
wiley   +1 more source

Ionospheric Turbulence and the Equatorial Plasma Density Irregularities: Scaling Features and RODI

open access: yesRemote Sensing, 2021
In the framework of space weather, the understanding of the physical mechanisms responsible for the generation of ionospheric irregularities is particularly relevant for their effects on global positioning and communication systems.
P. Michelis   +7 more
semanticscholar   +1 more source

Accurate and Robust Sensing of the Ionosphere With Uncoded Long Pulse ISR Measurements: 1‐Lag Profile Inversion of Ion Composition and Temperature

open access: yesRadio Science, Volume 61, Issue 1, January 2026.
Abstract Incoherent scatter radar probing of the topside F‐region ionosphere with reduced electron densities residing at relatively large radar ranges requires the use of uncoded long pulse (ULP) transmissions. In these ULP measurements the range resolution is necessarily poor, rendering the inference of ionospheric state parameters such as composition,
Binghui Wang   +3 more
wiley   +1 more source

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

open access: yesRemote 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   +8 more
doaj   +1 more source

A Survey of Atmospheric Gravity Waves Observed by GOLD During Quiet to Moderate Solar and Geomagnetic Activity

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Atmospheric gravity waves (GWs) are believed to transport energy and momentum between different regions of the atmosphere. Historically, observations of these waves from both ground and space have been relatively abundant at altitudes up to the lower thermosphere, and somewhat less abundant in the upper thermosphere and F‐region ionosphere ...
Scott L. England   +3 more
wiley   +1 more source

The nighttime ionospheric response and occurrence of equatorial plasma irregularities during geomagnetic storms: a case study

open access: yesSatellite Navigation, 2021
Recent studies revealed that the long-lasting daytime ionospheric enhancements of Total Electron Content (TEC) were sometimes observed in the Asian sector during the recovery phase of geomagnetic storms (e.g., Lei (J Geophys Res Space Phys 123: 3217–3232,
X. Wan   +7 more
semanticscholar   +1 more source

Longitudinal Variability of Pre‐Midnight Equatorial Plasma Bubbles Under Disturbed Geomagnetic Conditions

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract Equatorial plasma bubbles (EPBs) pose significant challenges to trans‐ionospheric radio communication and navigation systems. Because of their disruptive effects, evaluating and predicting them is key for the development of space systems. The influence of geomagnetic activity on EPBs remains unclear, partly due to limited low‐latitude neutral ...
Gilda de Lourdes González   +6 more
wiley   +1 more source

A brief review of equatorial ionization anomaly and ionospheric irregularities

open access: yes, 2018
Following a brief history and progress of ionospheric research, this paper presents a brief review of the recent developments in the understanding of two major phenomena in low and mid latitude ionosphere—the equatorial ionization anomaly (EIA) and ...
N. Balan, Libo Liu, H. Le
semanticscholar   +1 more source

Assessment of the Generation of Traveling Ionospheric Disturbances by Solar Terminators

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.
Abstract The generation of traveling ionospheric disturbances (TIDs) near solar terminators has been predicted, and several studies have reported the detection of TIDs associated with sunrise. However, there are also observations that do not show TID signatures at sunrise.
Hyosub Kil   +5 more
wiley   +1 more source

Space weather challenges of the polar cap ionosphere [PDF]

open access: yes, 2016
This paper presents research on polar cap ionosphere space weather phenomena conducted during the European Cooperation in Science and Technology (COST) action ES0803 from 2008 to 2012.
Alfonsi, Lucilla   +5 more
core   +4 more sources

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