Results 31 to 40 of about 4,627 (227)

Helium in the topside Venus ionosphere [PDF]

Journal of Geophysical Research, 1973
The quantity of helium in the Venus atmosphere is estimated from an examination of the measured ionization profiles. The amount of helium necessary to give agreement between the computed and experimental results is approximately 4 x 10 to the 8th power/cucm at 140 km.
openaire   +1 more source

Peak characteristics of F2 region over Tucumán: Predictions and measurements [PDF]

, 2008
Ionosonde measurements obtained at Tucuman are used to check the validity of the International Reference Ionosphere model to predict the maximum electron density of F2 region (NmF2) and its height (hmF2) over this station. Data corresponding to different
Ezquer, Rodolfo Gerardo, López, J., Mosert, Marta Estela, Scida, Luis Alberto   +3 more
core   +1 more source

New formulation for the topside ionosphere and plasmasphere based on NeQuick

Journal of Space Weather and Space Climate
The total electron content (TEC) affecting signal propagation of Global Navigation Satellite Systems (GNSS) is strongly influenced by the topside ionosphere and plasmasphere. This study introduces a new approach to representing the two regions.
Prol Fabricio dos Santos, Pignalberi Alessio, Smirnov Artem   +2 more
doaj   +1 more source

Geometric total electron content models for topside ionospheric sounding [PDF]

, 2014
The ionosphere is commonly divided into the portion below (bottomside) and above (topside) the region at which peak values of electron density occur. Topside ionospheric modeling is a challenging problem because of the limited data available. Indeed, the
Tancredi, Urbano
core   +1 more source

Estimated plasmasphere electron content and O⁺/H⁺ transition height during the February 2022 geomagnetic storm from Irkutsk IS radar data

Solar-Terrestrial Physics
We study the topside ionosphere above the NmF2 ionization maximum and the transition region between the ionosphere and the plasmasphere. We analyze the interaction between the topside ionosphere and the plasmasphere during a strong geomagnetic storm in ...
Khabituev D. S., Zherebtsov G. A., Ivonin V. A., Lebedev V. P.   +3 more
doaj   +1 more source

Topside Ionosphere as seen by Swarm GPS

, 2019
As a result of the coupling between the solar wind and the Earth’s magnetosphere-ionosphere system, plasma density irregularities are often developed in the polar ionosphere, which in turn can severely degrade satellite-based positioning and communication systems.
Schreiter, L., Arnold, D., Stolle, C., Jäggi, A.   +3 more
openaire   +3 more sources

Manifestation of solar activity in the global topside ion composition − a study based on satellite data [PDF]

Annales Geophysicae, 2005
The solar cycle variation of the most important parameters characterizing the ion composition in the topside ionosphere is studied. For this purpose data from the ACTIVE mission (the IK-24 satellite) for the maximum of solar cycle 22 (aver F10.7~200),
V. Truhlík, L. Trísková, J. Šmilauer
doaj   +1 more source

On Turbulent Features of E × B Plasma Motion in the Auroral Topside Ionosphere: Some Results from CSES-01 Satellite

Remote Sensing, 2022
The recent Chinese Seismo-Electromagnetic Satellite (CSES-01) provides a good opportunity to investigate some features of plasma properties and its motion in the topside ionosphere. Using simultaneous measurements from the electric field detector and the
Giuseppe Consolini, Virgilio Quattrociocchi, Simone Benella, Paola De Michelis, Tommaso Alberti, Mirko Piersanti, Maria Federica Marcucci   +6 more
doaj   +1 more source

Imaging the Perpendicular Plasma Dynamics Driving a Discrete Auroral Arc

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Measurements of motions and structuring in auroral luminosity are combined with magnetically connected plasma measurements from the Reimei spacecraft to image the perpendicular plasma dynamics active above a discrete auroral arc. It is demonstrated how the inversion of optical flow patterns specifies the potential structure above regions of ...
C. C. Chaston
wiley   +1 more source

Ionospheric topside models compared with experimental electron density profiles

Annals of Geophysics, 2005
Recently an increasing number of topside electron density profiles has been made available to the scientific community on the Internet. These data are important for ionospheric modeling purposes, since the experimental information on the ...
S. M. Radicella, P. Coïsson
doaj   +1 more source