Results 41 to 50 of about 4,627 (227)
Localized structure in the cusp and high-latitude ionosphere: a modelling study [PDF]
Annales Geophysicae, 1999 The ionospheric signature of a flux transfer event (FTE) seen in EISCAT radar data has been used as the basis for a modelling study using a new numerical model of the high-latitude ionosphere developed at the University of Sheffield, UK. The evolution
H. F. Balmforth +2 more
doaj +1 more source
Positive ion temperatures above the F-layer maximum [PDF]
, 1965 Positive ion temperatures above F layer maximum from Ariel I satellite ion mass ...
Boyd, R. L. F., Raitt, W. J.
core +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract We investigated the quiet‐time temporal variations of the Equatorial Ionization Anomaly (EIA) and underlying plasma fountain observed in the topside ionosphere during the various F‐region equatorial E × B drift events recorded by the Jicamarca Incoherent Scatter Radar and simulated by SAMI3.
Ildiko Horvath, Brian C. Lovell
wiley +1 more source
Is there a hole in the topside, equatorial ionosphere?
Results in Physics, 2016 A paper in 2000 (Huba, 2000) found a depression in electron density in the topside ionosphere near the magnetic equator, based on the SAMI-2 physical ionospheric model.
D. Gallagher
doaj +1 more source
Space Weather, 2022 Modeling the Earth's ionosphere is a critical component of forecasting space weather, which in turn impacts radio wave propagation, navigation and communication.
S. Dutta, M. B. Cohen
doaj +1 more source
Global GNSS Observation of Mesoscale Ionospheric Irregularities (2006–2024)
Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.Abstract Mesoscale ionospheric irregularities are statistically investigated using an unprecedented 19‐year long‐term global GNSS (Global Navigation Satellite System) TEC (total electron content) data set. These irregularities are represented by ionospheric fluctuations within a 5°× ${}^{\circ}\times $ 3.75° ${}^{\circ}$ (latitude by longitude) region ...
Shun‐Rong Zhang +7 more
wiley +1 more source
Topside Electron Density Modeling Using Neural Network and Empirical Model Predictions
Space Weather, 2023 We model the electron density in the topside of the ionosphere with an improved machine learning (ML) model and compare it to existing empirical models, specifically the International Reference Ionosphere (IRI) and the Empirical‐Canadian High Arctic ...
S. Dutta, M. B. Cohen
doaj +1 more source
Toward a Dynamic Model for Topside Ionospheric Irregularities: Spherical Harmonic Decomposition
Space Weather, Volume 24, Issue 3, March 2026.Abstract Ionospheric irregularities arise from highly dynamic and turbulent processes related to magnetosphere‐ionosphere coupling and can lead to electromagnetic signal distortion or loss of lock events in global navigation satellite system signals, representing a hazard associated with space weather events. For this reason, understanding and modeling
S. Mestici +6 more
wiley +1 more source
Study on Equatorial Bubbles Detected by SPS IMS Onboard the Kompsat-I [PDF]
Journal of Astronomy and Space Sciences, 2002 Space Physics Sensor onboard the KOMPSAT-1, which was launched at 1999, had transmitted ionospheric data during the solar maximum from June 2000 to August 2001.
Jaejeung Park +3 more
doaj +1 more source
Global Bottomside Ionospheric Modeling Based on GNSS‐RO Observations From the Tianmu‐1 Constellation
Space Weather, Volume 24, Issue 3, March 2026.Abstract Radio occultation (RO) observations provide a crucial means for estimating the global Vertical Bottomside Electron Content (VBEC) in the ionosphere. However, the limited number of low Earth orbit (LEO) satellites in existing RO missions restricts the capability for high‐precision reconstruction of global VBEC spatiotemporal variations.
Linghuo Jian +4 more
wiley +1 more source