Results 141 to 150 of about 643,536 (161)

Variation in Plasmaspheric Hiss Wave Power With Plasma Density

Geophysical Research Letters, 2018
AbstractPlasmaspheric hiss waves are commonly observed in the inner magnetosphere. These waves efficiently scatter electrons, facilitating their precipitation into the atmosphere. Predictive inner magnetosphere simulations often model hiss waves using parameterized empirical maps of observed hiss power. These maps nearly always include parameterization
George G. Hospodarsky, John Wygant, Jean-François Ripoll   +2 more
exaly   +2 more sources

Competition between outer zone electron scattering by plasmaspheric hiss and magnetosonic waves [PDF]

Geophysical Research Letters, 2017
AbstractWe quantify the electron scattering effects of simultaneous plasmaspheric hiss and magnetosonic waves that occurred in two neighboring time intervals but with distinct wave intensity profiles on 21 August 2013. Their combined scattering is found capable of causing electron distribution variations largely distinguishable from the consequences of
Binbin Ni, Juan Yi, Man Hua
exaly   +2 more sources

Electron Diffusion by Coexisting Plasmaspheric Hiss and Chorus Waves: Multisatellite Observations and Simulations

Geophysical Research Letters, 2020
AbstractWe report a rare event of intense plasmaspheric hiss and chorus waves simultaneously observed at the same L shell but different magnetic local times by Van Allen Probes and Magnetospheric Multiscale. Based on the measured waves and electron distributions, we calculate the bounce‐averaged diffusion coefficients and subsequently simulate the ...
Jing Yu, Jun Cui, Liuyuan Li
exaly   +2 more sources

Simultaneous Evolutions of Inner Magnetospheric Plasmaspheric Hiss and EMIC Waves Under the Influence of a Heliospheric Plasma Sheet

Geophysical Research Letters, 2022
AbstractPlasmaspheric hiss and electromagnetic ion cyclotron (EMIC) waves are two of the most important magnetospheric plasma waves inside the Earth's high‐density plasmasphere. In this work, utilizing observations from the WIND and Van Allen Probes missions, we investigate the simultaneous evolutions of inner magnetospheric plasmaspheric hiss and EMIC
Zhaoguo He, Nigang Liu, Jiang Yu
exaly   +2 more sources

Substorm dependence of plasmaspheric hiss

Journal of Geophysical Research: Space Physics, 2004
We analyze wave and particle data from the CRRES satellite to determine the variability of plasmaspheric hiss (0.1 500 nT), with an average amplitude of 40 +/- 1 pT observed in the region 2 15degrees) hiss is strongest during active conditions with an ...
Nigel P. Meredith, Richard B. Horne, Danny Summers   +2 more
exaly   +2 more sources

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On the origin of plasmaspheric hiss: The importance of wave propagation and the plasmapause

Journal of Geophysical Research: Space Physics, 1979
The presence of a turbulent band of ELF hiss throughout the plasmasphere has been modeled by following unducted whistler mode waves from a restricted region of cyclotron resonant growth in the outer plasmasphere. The most unstable waves originate near the equatorial plane within a modest cone of wave normal angles aligned along the ambient magnetic ...
R.M. Thorne, S.R. Church, D.J. Gorney
openaire   +1 more source

Determining the global coherence of plasmaspheric hiss waves in the magnetosphere

2020
<p>Plasmaspheric hiss waves is important in the radiation belt. Previous papers have shown that considering the variability of wave parameters will improve the effectiveness of modeling wave-particle interactions in the Radiation Belt, but less is known about how rapidly (and by how much) wave characteristics vary.
Shuai Zhang, Jonathan Rae, Clare Watt, Alexander Degeling, Anmin Tian, Quanqi Shi   +5 more
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Global Survey of Electron Precipitation due to Hiss Waves in the Earth’s Plasmasphere and Plumes

Journal of Geophysical Research: Space Physics, 2021
AbstractWe present a global survey of energetic electron precipitation from the equatorial magnetosphere due to hiss waves in the plasmasphere and plumes. Using Van Allen Probes measurements, we calculate the pitch angle diffusion coefficients at the bounce loss cone, and evaluate the energy spectrum of precipitating electron flux. Our ∼6.5‐year survey
Q. Ma, W. Li, X. ‐J. Zhang, J. Bortnik, X. ‐C. Shen, H. K. Connor, A. J. Boyd, W. S. Kurth, G. B. Hospodarsky, S. G. Claudepierre, G. D. Reeves, H. E. Spence   +11 more
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Whistlers and plasmaspheric hiss: Wave directions and three‐dimensional propagation

Journal of Geophysical Research: Space Physics, 1993
Wave data from the DE 1 satellite showing simultaneously nonducted whistlers and hiss are analyzed to determine wave propagation directions. At L = 3.8 and a geographic latitude of λg = 12°S, the average wave normal directions of discrete whistlers are measured to be ∼51° for fnof;= 4.5 kHz and ∼60° for fnof;= 3.5 kHz, forming a small (<20°) angle ...
A. B. Draganov, U. S. Inan, V. S. Sonwalkar, T. F. Bell   +3 more
openaire   +1 more source

Precipitation Loss of Radiation Belt Electrons by Two‐Band Plasmaspheric Hiss Waves

Journal of Geophysical Research: Space Physics, 2020
AbstractA two‐band plasmaspheric hiss consisting of a low‐frequency band (normal hiss with the frequency below 2 kHz) and a high‐frequency band (locally generated hiss with the frequency up to 10 kHz) was observed on 6 January 2014 by the Van Allen Probes (He et al., 2019, https://doi.org/10.1029/2018GL081578).
Zhaoguo He, Qi Yan, Xiaoping Zhang, Jiang Yu, Yonghui Ma, Yong Cao, Jun Cui   +6 more
openaire   +1 more source