Results 31 to 40 of about 22,029 (223)

Electric Field Multifractal Features in the High-Latitude Ionosphere: CSES-01 Observations

open access: yesAtmosphere, 2021
In the polar ionosphere, the electric field is characterized by broadband and power law spectral densities at small/short spatio-temporal scales, which support a possible turbulent nature of the electric field fluctuations.
Giuseppe Consolini   +6 more
doaj   +1 more source

Evaluation of E Layer Dominated Ionosphere Events Using COSMIC/FORMOSAT-3 and CHAMP Ionospheric Radio Occultation Data [PDF]

open access: yes, 2020
At certain geographic locations, especially in the polar regions, the ionization of the ionospheric E layer can dominate over that of the F2 layer. The associated electron density profiles show their ionization maximum at E layer heights between 80 and ...
Hoque, Mohammed M.   +3 more
core   +2 more sources

A Review on Structure of the Polar Ionosphere

open access: yesAntarctic Record, 1979
Characteristic features of the structure of the polar ionosphere in the polar cap, auroral oval zone and trough region, and physical processes affecting the polar ionosphere are summarized.
Nobuo MATSUURA
doaj   +1 more source

Correlation between the Orientation of Cross-Field Axes of Small-Scale Anisotropic Irregularities in Midlatitude Ionosphere and Drift Direction in the F Region

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2019
Introduction. It has been previously reported that small-scale irregularities (SSI) in the polar ionosphere are elongated along the magnetic field and anisotropic in its cross-field direction.
Valery A. Panchenko   +2 more
doaj   +1 more source

Ionospheric control of the magnetosphere: conductance [PDF]

open access: yesAnnales Geophysicae, 2004
It is well known that the ionosphere plays a role in determining the global state of the magnetosphere. The ionosphere allows magnetospheric currents to close, thereby allowing magnetospheric convection to occur.
A. J. Ridley   +2 more
doaj   +1 more source

Geomagnetic disturbances on ground associated with particle precipitation during SC [PDF]

open access: yes, 2010
We have examined several cases of magnetosphere compression by solar wind pressure pulses using a set of instruments located in the noon sector of auroral zone. We have found that the increase in riometric absorption (sudden commencement absorption, SCA)
Honary, F.   +4 more
core   +11 more sources

Dynamics on Polar Ionosphere (Reports of the Japanese Antarctic Research Expedition)

open access: yesAntarctic Record, 1972
Future projects for the Antarctic rocket observations are discussed with regard to two dynamical problems on polar upper atmosphere and polar ionosphere.
Nobuo MATUURA
doaj   +1 more source

Magnetopause mapping to the ionosphere for northward IMF [PDF]

open access: yesAnnales Geophysicae, 2007
We study the topological structure of the magnetosphere for northward IMF. Using a magnetospheric magnetic field model we study the high-latitude response to prolonged periods of northward IMF.
I. I. Alexeev   +6 more
doaj   +1 more source

Jupiter's polar ionospheric flows: Theoretical interpretation [PDF]

open access: yesGeophysical Research Letters, 2003
Prompted by recent observations of ion flows from Doppler measurements of infrared auroras, we here discuss the nature of the plasma flow in Jupiter's high‐latitude ionosphere. The physical picture is based on a combination of three elements, namely an inner Hill‐type sub‐corotating region containing outward‐diffusing iogenic plasma, an outer sub ...
Cowley, S. W. H.   +3 more
openaire   +3 more sources

The thermospheric effects of a rapid polar cap expansion [PDF]

open access: yesAnnales Geophysicae, 1998
In a previous publication we used results from a coupled thermosphere-ionosphere-plasmasphere model to illustrate a new mechanism for the formation of a large-scale patch of ionisation arising from a rapid polar cap expansion.
D. W. Idenden
doaj   +1 more source

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