Results 71 to 80 of about 41,349 (201)

Simultaneous rocket and satellite measurements of the topside ionosphere [PDF]

, 1964
Charged-particle profiles of upper ionosphere from alouette topside satellite sounding, compared with rocket- & ground-based backscatter ...
Fitzenreiter, R. J., Jackson, J. E., Donley, J. L., Blumle, L. J., Bauer, S. J.   +4 more
core  

Physics‐Embedded Deep Learning Reveals the Memory Effect of Ionospheric Electron Density in Response to Solar EUV Forcing

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Precise characterization of the electron density profile is crucial for optimizing high frequency communications. Reconstruction models often assume an instantaneous ionospheric response to solar forcing or using time delays, neglecting the time‐integrated cumulative “memory effect” of plasma dynamics.
Hongwei Gong, Hanxian Fang, Die Duan, Chao Xiao, Jintai Li, Chenghao Li, Hongtao Huang, Ganming Ren, Chuyue Zhou, Han Wu   +9 more
wiley   +1 more source

Simultaneous TRACERS and THEMIS Observations of Reversed Cusp Ion Dispersions and Dual‐Lobe Reconnection

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract We present observations from two consecutive TRACERS‐2 orbits through the northern low‐altitude cusp. During the first crossing, TRACERS‐2 observed reversed cusp ion dispersion and sunward convection, consistent with magnetopause reconnection tailward of the cusp during this northward IMF interval.
M. Øieroset, S. A. Fuselier, J. B. Bonnell, R. A. Roglans, J. S. Halekas, R. J. Strangeway, T. D. Phan, R. G. Gomez, S. M. Petrinec, K. J. Trattner, S. R. Shaver, K. A. Goodrich, S. A. Henderson, S. L. Soni, V. Angelopoulos, B. L. Burkholder, H. Cao, L.‐J. Chen, H. K. Connor, D. M. Miles, A. Moore, J. Ng, Y. Shen   +22 more
wiley   +1 more source

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

Electon density profiles of the topside ionosphere

Annals of Geophysics, 2002
The existing uncertainties about the electron density profiles in the topside ionosphere, i.e., in the height region from h m F 2 to ~ 2000 km, require the search for new data sources. The ISIS and Alouette topside sounder satellites from the sixties to the eighties recorded millions of ionograms but most were not analyzed in terms of electron density ...
Huang, X., Reinisch, B. W., Bilitza, D., Benson, R. F.   +3 more
openaire   +4 more sources

IRI Model Specification of the Upper Transition Height at the Equatorial Region: Comparison Against a Dedicated Model Based on C/NOFS Data During Low Solar Activity

Space Weather, Volume 24, Issue 7, July 2026.
Abstract The Upper Transition Height (UTH) is a critical parameter for understanding topside ionosphere dynamics. This study evaluates the UTH performance of the International Reference Ionosphere (IRI) model using the TBT15 ion composition option and compares it against a dedicated UTH model developed from the Communication/Navigation Outage Forecast ...
Fabricio Prol, Alessio Pignalberi, Artem Smirnov   +2 more
wiley   +1 more source

Performance Investigation of Four Ionospheric Models in Estimating hmF2 in High‐Latitude Regions

Space Weather, Volume 24, Issue 7, July 2026.
Abstract As a critical parameter characterizing the vertical structure of the ionosphere, the peak height of the F2 layer (hmF2) plays an essential role in frequency selection and signal propagation in high‐frequency (HF) communication systems. Accurate prediction of hmF2 is particularly important in high‐latitude regions.
T. Y. Li, Q. Yu, Y. F. Shi, C. Yang, J. Q. Fan, J. Wang   +5 more
wiley   +1 more source

Behavior of the topside ionosphere during a great magnetic storm [PDF]

, 1967
Variations in electron density distribution of topside ionosphere obtained from Alouette 1 during great magnetic storm of 17-18 April ...
Krishnamurthy, B. V., Bauer, S. J.
core  

Plasma bubble phenomenon in the topside ionosphere

, 2007
There are the indications that plasma bubbles/flux tube aligned plasma density depletions, produced by Rayleigh–Taylor instability at the bottomside of ionosphere, could rise up to the topside ionosphere and plasmasphere.
Sidorova, L. N.
core   +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