Results 41 to 50 of about 2,463,485 (172)

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

Long‐Lived Equatorial Plasma Bubbles Persisting Into the Afternoon Over the Pacific Sector During the Recovery Phase of the April 2023 Geomagnetic Storm

Space Weather, Volume 24, Issue 9, September 2026.
Abstract Equatorial plasma bubbles (EPBs) are typically nighttime ionospheric irregularities, and their persistence into daytime sectors remains insufficiently understood. Here, we investigate long‐lived EPB‐related plasma depletion structures over the Pacific sector during the recovery phase of the 23–25 April 2023 geomagnetic storm using Formosa ...
Hailun Ye, Wen Yi, Jianfei Wu, Bingkun Yu, Penghao Tian, Xianghui Xue, Yajun Zhu, Jianyuan Wang, Jianyong Lu, Jian Li, Chong Wang, Tingdi Chen, Xiankang Dou   +12 more
wiley   +1 more source

Comparison of analytical functions used to describe topside electron density profiles with satellite data

Annals of Geophysics, 2005
Electron density models of the ionosphere use different analytical formulations for the electron density vertical profile in the topside. The present paper compares some single-layer topside analytical descriptions (Chapman, Epstein, modified ...
S. M. Radicella, B. Nava, P. Coïsson, C. Fonda   +3 more
doaj   +1 more source

HF Heating Effects as Seen From Below and Above: First Results of Joint SURA–Ionosfera‐M Experiment

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract This paper presents the first results of a coordinated experiment on the ionospheric plasma response to high‐frequency (HF) overdense heating, conducted using the SURA heating facility and the Ionosfera‐M satellite. The experiment combined ground‐based observations with in situ satellite measurements, enabling a comprehensive study of ...
A. A. Chernyshov, A. M. Padokhin, S. M. Grach, D. A. Kogogin, A. V. Shindin, S. A. Pulinets, I. A. Nasyrov, A. B. Beletsky, I. D. Tkachev, J. K. Legostaeva, D. V. Chugunin, M. A. Evdokimova, G. A. Kurbatov, K. G. Tsybulya, A. E. Solin, A. V. Shchennikov, E. V. Tareeva, V. V. Emelyanov, M. M. Mogilevsky   +18 more
wiley   +1 more source

Analysis of a topside ionospheric model using GPS and ionosonde observables

Advances in Space Research, 2008
Abstract Ground-based vertical incidence soundings are well suited to model the bottom-side ionosphere but are not so good for dependably modelling the topside ionosphere. This study aims to combine vertical incidence sounding and dual-frequency GPS measurements to reconstruct the topside profile. The reconstruction technique relays on the use of the
Meza, Amalia Margarita, Brunini, Claudio Antonio, Gularte Scarone, Angela Erika, Mosert, Marta Estela   +3 more
openaire   +3 more sources

Global Cowling Effects in the Sq‐EEJ Current System Under Electrostatic Approximation: Theoretical Simulation

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract The solar quiet (Sq) current and equatorial electrojet are widely known as one of the fundamental currents in ionosphere. Although the Sq‐EEJ current system has been extensively investigated, the manner in which Hall and Pedersen current components collectively organize the system has not been clearly described.
T. Ijuin, H. Jin, A. Yoshikawa
wiley   +1 more source

EISCAT/CRRES observations: Nightside ionospheric ion outflow and oxygen-rich substorm injections [PDF]

, 1996
We present combined observations made near midnight by the EISCAT radar, all-sky cameras and the combined released and radiation efects satellite (CRRES) shortly before and during a substorm.
Gazey, N. G. J., Aylward, A. D., Bunting, R., Wilken, B., Perry, C., Gazey, N.G.J., Bunting, R.J., Opgenoorth, H., Lockwood, M., Smith, P., Lockwood M, Coles S, Lockwood, Mike, Aylward AD, Aylward, A.D., Grandé, M., Coles, S., Gazey NGJ, Perry, C.H., Smith PN, Gazey, N., Smith, P. N., M. Grande, M. Gr, N. G. J. Gazey, Grande M, Bunting RJ, H. Opgenoorth, B. Wilken, A. D. Aylward, Smith, P.N., Bunting, R. J., Perry, C. H., Wilken B, M. Lockwood, S. Coles, Opgenoorth H, P. N. Smith, Perry CH, R. J. Bunting, Aylward, A., C. H. Perry   +41 more
core   +2 more sources

Long‐Term Trends in the Ionospheric Equivalent Slab Thickness as a Proxy of Climate Change in the Ionosphere

Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.
Abstract Global warming warms the lower atmosphere, but cools and contracts the upper atmosphere. These changes also affect the ionosphere, altering the vertical distribution of plasma through changes in the plasma scale height. Here, we use ionospheric equivalent slab thickness (τ) multidecadal time series, derived through observations from co‐located
A. Pignalberi, T. Alberti
wiley   +1 more source

Signal Data Stream Parameters Passing Ionospheric Communication Links With Fading Caused by Natural Clutter Phenomena

Radio Science, Volume 61, Issue 8, August 2026.
Abstract This paper explores the impact of natural phenomena on signal data transmission across various ionospheric communication channels. The study focuses on three primary phenomena: meteor trails prevalent in the middle‐ and lower‐latitude ionosphere, bubble and plume structures observed around the equatorial ionosphere, and magnetic‐storm‐induced ...
I. Bronfman, Y. Ben‐Shimol, N. Blaunstein   +2 more
wiley   +1 more source

Statistical models of the variability of plasma in the topside ionosphere: 1. Development and optimisation

Journal of Space Weather and Space Climate
This work presents statistical models of the variability of plasma in the topside ionosphere based on observations made by the European Space Agency’s (ESA) Swarm satellites. The models were developed in the “Swarm Variability of Ionospheric Plasma” (Swarm-VIP) project within the European Space Agency’s Swarm+4D-Ionosphere framework.
Alan G. Wood, Elizabeth E. Donegan-Lawley, Lasse B. N. Clausen, Luca Spogli, Jaroslav Urbář, Yaqi Jin, Golnaz Shahtahmassebi, Lucilla Alfonsi, James T. Rawlings, Antonio Cicone, Daria Kotova, Claudio Cesaroni, Per Høeg, Gareth D. Dorrian, Luke D. Nugent, Sean Elvidge, David R. Themens, María José Brazal Aragón, Pawel Wojtkiewicz, Wojciech J. Miloch   +19 more
openaire   +5 more sources