Results 71 to 80 of about 1,563 (166)

Topside Ionospheric Characterization and NeQuick2 Model Evaluation Based on Tianmu-1 and COSMIC-2 Observations

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The topside ionosphere, extending from the F2-layer peak toward the plasmasphere, plays an essential role in satellite navigation and space weather applications.
Haojie Liu, Xingliang Huo, Ting Zhang, Yunbin Yuan, Kaixin Wang, Weihong Sun, Qi Liu, Min Li   +7 more
doaj   +1 more source

Calibration and Fusion of GOLD‐Inferred TEC Data With Ground‐Based TEC

Space Weather, Volume 24, Issue 6, June 2026.
Abstract Ground‐based Global Navigation Satellite System (GNSS) receivers provide primary total electron content (TEC) measurements used to monitor ionospheric variability, yet their sparse distribution over oceanic and equatorial regions limits global coverage and model accuracy.
Maria Smirnova, Shasha Zou, Grace Kwon, Hang Liu, Yang Chen   +4 more
wiley   +1 more source

Impact of Coronal Mass Ejection-driven Enhanced Magnetic Pressure on the Martian Northern Hemispheric Ionosphere during 2024 May 17–18

The Astrophysical Journal
The Martian northern hemisphere (NH) is relatively devoid of ambient magnetic fields compared to the southern hemisphere (SH), which houses the strong crustal field regions.
V.S.P. Pranjali, Chinmaya Nayak, Erdal Yiğit, David Andrews, Stephan Buchert, Suraj Gupta, Satyavir Singh, A.P. Dimri   +7 more
doaj   +1 more source

First Detection of the Two‐Dimensional Vertical Propagation of Traveling Ionospheric Disturbances Associated With Atmospheric Gravity Waves in the Martian Ionosphere

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract We report the detection of a traveling ionospheric disturbance (TID) captured by the Mars Advanced Radar for Subsurface and Ionosphere Sounding (MARSIS) Active Ionospheric Sounding (AIS) instrument aboard the Mars Express spacecraft at 150–250 km altitude.
Rong Tian, Beatriz Sánchez‐Cano, Chunhua Jiang, Mark Lester, Dikshita Meggi, Simon Joyce, Christopher M. Fowler, Andrea Cicchetti, Mats Holmstrom, David Andrews, Pedro Machado   +10 more
wiley   +1 more source

On the Peculiar Properties of Extremely Low Frequency Lightning Generated Whistlers Detected at Low Earth Orbit Altitudes Close to the Magnetic Equator

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Lightning strikes generate broadband electromagnetic signals. At Extremely Low Frequencies (ELF), these signals partly leak into the ionosphere and produce so‐called Lightning Generated (LG) whistlers that the Absolute Scalar Magnetometers on board the ESA Swarm satellites can detect.
M. Jenner, P. Coïsson, G. Hulot, L. Chauvet, R. Deborde   +4 more
wiley   +1 more source

Hydrogen & Oxygen Ion Densities & Fluxes In Low & Midlatitude Topside Ionosphere [PDF]

, 1974
284-288The daytime altitudinal variation of ion diffusion flaxes and their influence on H+ and O+ densities in the topside ionosphere in the low and midlatitudes are investigated theoretically, taking into account the ionosphere protonosphere coupling ...
Jain, V. C., Rao, B. C. Narasinga
core  

Intercalibration of the Plasma Density Measurements in Earth's Topside Ionosphere

, 2021
Over the last 20 years, a large number of instruments have provided plasma density measurements in Earth's topside ionosphere. To utilize all of the collected observations for empirical modeling, it is necessary to ensure that they do not exhibit ...
Goss, Andreas, Chao Xiong, Lühr, Hermann, Szabó-Roberts, Mátyás, Mainul Hoque, Smirnov, Artem, Shprits, Yuri, Shprits, Yuri Y. (Prof. Dr.), Mátyás Szabó‐Roberts, Zhelavskaya, Irina (Dr.), Pedatella, Nicholas, Andreas Goss, Hoque, Mainul, Yuri Shprits, Schmidt, Michael, Hermann Lühr, Prol, Fabricio S., Zhelavskaya, Irina, Nicholas Pedatella, Xiong, Chao, Artem Smirnov, Fabricio S. Prol, Irina Zhelavskaya, Michael Schmidt   +23 more
core   +1 more source

Variations of topside ionospheric electron density near the dawn terminator in relation to geomagnetic activity

Journal of Space Weather and Space Climate, 2017
A statistical study to determine the influence of geomagnetic disturbances on the ionosphere across the dawn terminator at subauroral and middle latitudes is performed, based on the vertical electron density profiles measured by the GPS Occultation ...
Tam Sunny W.Y., Chen Chien-Han, Wang Kaiti   +2 more
doaj   +1 more source

Daytime Ionospheric F‐Region Topside Irregularities Associated With Significant Density Enhancement at Low Latitudes During the 12 November 2025 Magnetic Storm

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract In this study, daytime F‐region irregularities were observed at low latitudes during the main phase of the 12 November 2025 strong magnetic storm, causing intense very high frequency radar echoes ranging hundreds of kilometers in altitude.
Wenjie Sun, Guozhu Li, Guofeng Dai, Haiyong Xie, Lianhuan Hu, Biqiang Zhao, Zequan Wang, Jianfei Liu, Xiukuan Zhao, Yi Li, Baiqi Ning   +10 more
wiley   +1 more source

Detection of Equatorial Plasma Bubbles Using the COSMIC‐2 Rate of TEC Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Equatorial plasma bubbles (EPBs) are large‐scale plasma depletion structures that can disrupt Global Navigation Satellite Systems (GNSS) and other space‐based technologies. Several instruments have been employed to study EPB dynamics, with Total Electron Content (TEC) and Rate of TEC change Index (ROTI) data standing out as valuable parameters
Ana L. Christovam, Fabricio S. Prol, Marcio T. A. H. Muella   +2 more
wiley   +1 more source