Results 1 to 10 of about 2,944,088 (246)

Dynamic Probe Measurements in the Ionosphere [PDF]

open access: yesPhysical Review, 1949
Preliminary rather successful attempts to determine the ionization in the E-layer by means of a probe technique are described. The probe current showed an extremely rapid rise between 90 and 105 km altitude. The result indicates a positive-ion density about ten times larger than the electron density.
A. Reifman, W. G. Dow
exaly   +3 more sources

The Effects of Solar Wind Dynamic Pressure on the Structure of the Topside Ionosphere of Mars

open access: yesGeophysical Research Letters, 2019
We use Mars Atmosphere and Volatile EvolutioN observations of the upstream solar wind, and Mars Express observations of ionospheric electron densities and magnetic fields, to study how the topside ionosphere (>320 km) of Mars is affected by variations in
Z. Girazian   +5 more
doaj   +2 more sources

Target Altitude Estimation in Over-the-Horizon Radar

open access: yesIEEE Access, 2022
Doppler signatures of local multipath signals provide useful information for target altitude estimation in over-the-horizon radar surveillance. In this paper, we develop a method to improve the resolution of these multipath Doppler signatures and enable ...
Yimin D. Zhang   +2 more
doaj   +1 more source

Retrospective analysis of long-term regional features of the dynamic regime of the ionosphere over the south of Eastern Siberia

open access: yesSolar-Terrestrial Physics, 2023
We have carried out a statistical analysis of a huge array of archival experimental data on the dynamic regime of the ionosphere over Irkutsk, obtained by a radiophysical spaced-receiver method with a small base of a radio signal reflected from the ...
Khabituev D. S., Chernigovskaya M. A.
doaj   +1 more source

Simulation of Transient Topside Layer in the Martian Ionosphere

open access: yesRemote Sensing, 2023
Many Mars missions, e.g., Mariner, Viking, Mars Global Surveyor (MGS), Mars Express (MEX), and Mars Atmosphere and Volatile Evolution (MAVEN), have been launched to study the Martian atmosphere.
Chunhua Jiang, Rong Tian, Lehui Wei
doaj   +1 more source

A new scenario applying traffic flow analogy to poleward expansion of auroras [PDF]

open access: yesAnnales Geophysicae, 2019
Transient westward electric fields from the magnetosphere generate equatorward plasma drifts of the order of kilometers per second in the auroral ionosphere.
O. Saka
doaj   +1 more source

Doppler shifts of HF radio waves along oblique propagation paths in the ionosphere

open access: yesВісник Харківського національногоуніверситету імені В.Н. Каразіна. Серія: Радіофізика та електроніка, 2023
Urgency. The ionosphere is widely used as a channel for radar, radioastronomy, radio navigation, communication links, and space-based  sounding the Earth.
L. F. Chernogor, Y. H. Zhdanko
doaj   +1 more source

Complex network description of the ionosphere [PDF]

open access: yesNonlinear Processes in Geophysics, 2018
Complex networks have emerged as an essential approach of geoscience to generate novel insights into the nature of geophysical systems. To investigate the dynamic processes in the ionosphere, a directed complex network is constructed, based on a ...
S. Lu   +7 more
doaj   +1 more source

Next generation magnetic field measurements from low-earth orbit satellites enable enhanced space weather operations

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Large-scale current systems in the ionosphere and the magnetosphere are intimately controlled by the solar wind-magnetosphere interaction and the magnetosphere-ionosphere coupling.
Guan Le   +14 more
doaj   +1 more source

Evidence of meso-scale structure in the high-latitude thermosphere [PDF]

open access: yesAnnales Geophysicae, 2001
There is a widely held assumption that the thermospheric neutral gas is slow to respond to magnetospheric forcing owing to its large inertia and therefore, may be treated as a steady state background medium for the more dynamic ionosphere.
A. L. Aruliah, A. L. Aruliah, E. Griffin
doaj   +1 more source

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