Results 31 to 40 of about 48,553 (267)

Variations of topside ionospheric electron density near the dawn terminator in relation to geomagnetic activity

open access: yesJournal of Space Weather and Space Climate, 2017
A statistical study to determine the influence of geomagnetic disturbances on the ionosphere across the dawn terminator at subauroral and middle latitudes is performed, based on the vertical electron density profiles measured by the GPS Occultation ...
Tam Sunny W.Y.   +2 more
doaj   +1 more source

Supersonic neutral winds and neutral streams in the thermosphere‐ionosphere‐plasmasphere system [PDF]

open access: yesRadio Science, 2009
Model studies were conducted to determine the conditions that might give rise to supersonic neutral winds in the high‐latitude thermosphere and that can produce neutral streams in the polar wind and plasmasphere. For the supersonic neutral wind study, we used a time‐dependent, three‐dimensional, global thermosphere‐ionosphere model.
L. C. Gardner, R. W. Schunk
openaire   +1 more source

Formation of Neutral Disk-Like Zone Around the Active Hot Stars in Symbiotic Binaries

open access: yesOpen Astronomy, 2012
In this contribution we present the ionization structure in the enhanced wind from the hot star in symbiotic binaries during active phases. Rotation of the hot star leads to the compression of the outflowing material towards its equatorial plane.
Cariková Z., Skopal A.
doaj   +1 more source

The effect of subauroral polarization streams on the mid-latitude thermospheric disturbance neutral winds: a universal time effect [PDF]

open access: yesAnnales Geophysicae, 2018
The temporal and spatial variations in thermospheric neutral winds at an altitude of 400 km in response to subauroral polarization streams (SAPS) are investigated using global ionosphere and thermosphere model simulations under the southward ...
H. Wang   +4 more
doaj   +1 more source

Field and Wind Tunnel Experiments of Wind Field Simulation in the Neutral Atmospheric Boundary Layer

open access: yesAtmosphere, 2022
To investigate the pollutant dispersion of a nuclear power plant, a field tracing experiment was carried out in neutral stratification weather with the main wind direction SSW.
Dong Xie   +5 more
doaj   +1 more source

A neutral wind instrument for nano-satellite platforms

open access: yesReview of Scientific Instruments, 2018
Here we describe the first neutral wind sensor developed specifically for use on resource limited nano-satellite platforms. The instrument is a next generation redesign of the ram wind sensor flown on the Communications/Navigation Outage Forecasting System satellite for measurements of neutral velocity, temperature, and composition.
L. J. Kordella   +7 more
openaire   +4 more sources

Comparison of surface wind speed and wind speed profiles in the Taklimakan Desert [PDF]

open access: yesPeerJ, 2022
Near-surface (10 m) wind speed (NWS) plays a crucial role in many areas, including the hydrological cycle, wind energy production, and the dispersion of air pollution.
Xinchun Liu   +3 more
doaj   +2 more sources

Coherence of Turbulent Wind Under Neutral Wind Conditions at FINO1

open access: yesEnergy Procedia, 2016
AbstractCurrent wind turbine design standards allow for two different approaches to model the wind field used for engineering estimates; The Mann turbulence model and the Kaimal wind spectra combined with a coherence function. The point wind spectra generated, using the recommended parameters, are similar, but there are differences in the spatial ...
Eliassen, Lene, Obhrai, Charlotte
openaire   +1 more source

Characterization of F-region neutral wind response times and its controlling factors during substorms

open access: yesFrontiers in Astronomy and Space Sciences
Ion-neutral coupling is responsible for dissipating energy deposited into the high-latitude ionosphere during geomagnetically active periods. The neutral wind response time, or the ion-neutral coupling efficiency, is not well characterized, with a wide ...
Katherine Davidson   +4 more
doaj   +1 more source

Kinetic Properties of the Neutral Solar Wind

open access: yesThe Astrophysical Journal, 2017
Abstract Charge-exchange collisions between the solar wind protons and interstellar hydrogen produce a distinctive population of neutral hydrogen streaming radially at nearly the solar-wind speed. This tenuous population, known as the neutral solar wind (NSW) is thought to play a key role in the appearance of the Interplanetary Boundary ...
V. Florinski, J. Heerikhuisen
openaire   +1 more source

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