搜索结果: 1-15 共查到“地球物理学 Plasma”相关记录39条 . 查询时间(0.125 秒)
日冕物质抛射(CME)是灾害性空间天气的主要驱动源，如何针对特定的CME事件, 了解其在日冕和行星际空间的传播特性及演化过程，预测近地空间太阳风状态的变化，是空间天气研究领域的重要内容，同时受到国内外学者的广泛关注，近年来，在CME传播特性的观测和数值模拟研究中取得了大量进展。
Plasma instabilities in meteor trails: 2-D simulation studies
2-D simulation studies Plasma instabilities
2017/3/22
Field-aligned plasma density irregularities detected as nonspecular echoes by radars
with large aperture-power products indicate the presence of plasma turbulence within
meteor trails. This paper pr...
Mapping plasma structures in the high-latitude ionosphere using beacon satellite, incoherent scatter radar and ground-based magnetometer observations
Beacon satellites ionospheric plasma
2015/9/25
In the autumn of the year 2000, four radio receivers capable of tracking various beacon satellites were set up along the southwestern coast of Greenland. They are used to reconstruct images of the ion...
Near Earth space plasma monitoring under COST 296
Ionosphere monitoring data validation monitoring techniques campaigns dissemination
2015/8/28
This review paper presents the main achievements of the near Earth space plasma monitoring under COST 296 Action. The outputs of the COST 296 community making data, historical and real-time, standardi...
Near-Earth space plasma modelling and forecasting
Ionospheric modeling ionospheric forecasting ionospheric predictions
2015/8/28
In the frame of the European COST 296 project (Mitigation of Ionospheric Effects on Radio Systems, MIERS) in the Working Package 1.3, new ionospheric models, prediction and forecasting methods and pro...
Space Plasma Effects
ionosphere/space weather monitoring ionospheric variability ionospheric bubbles ionospheric gradients
2015/8/28
This paper summarizes the activities carried out by WP 3.1 of WG 3 of COST 296 action. The Work Package deals mostly with medium and large ionospheric structures that impacts on GNSS signals. In the r...
The characterization of diffusion tensor for mid-latitude ionospheric plasma
Ionosphere Diffusion tensor Electrical conductivity
2015/8/17
In this study, the relationship between diffusion and the electrical conductivity tensor is investigated by using the real geometry of the Earth’s magnetic field in the Northern Hemisphere for mid-lat...
Particle‐in‐cell simulation of incoherent scatter radar spectral distortions related to beam‐plasma interactions in the auroral ionosphere
incoherent scatter radar auroral ionosphere
2017/3/22
An electrostatic parallel particle‐in‐cell (EPPIC) code that allows for particle beam
injections and multiple boundary conditions is used to investigate the beam‐plasma
interaction and its manifesta...
Non-Gaussian statistics in space plasma turbulence:fractal properties and pitfalls
Non-Gaussian statistics space plasma turbulence fractal properties pitfalls
2009/11/16
Statistical properties of collisionless plasmas in the vicinity of the Earth's bow shock are investigated with the aim to characterize the intermittent behaviour of non- magnetohydrodynamic turbulence...
A note on chaotic vs. stochastic behavior of the high-latitude ionospheric plasma density fluctuations
stochastic behavior high-latitude ionospheric plasma density fluctuations
2009/11/16
Four data sets of density fluctuations measured in-situ by the Dynamics Explorer (DE 2) were analyzed in an attempt to study chaotic nature of the high-latitude turbulence and, in this way to compleme...
A general coupling coefficient for three wave interactions in an ideal MHD plasma is presented. Using a special stratified background atmosphere, an explicit symmetric form of the coupling coefficient...
The nonlinear dustgrain-charging on large amplitude electrostatic waves in a dusty plasma with trapped ions
nonlinear dustgrain-charging large amplitude electrostatic waves dusty plasma trapped ions
2009/11/13
The nonlinear dustgrain-charging and the influence of the ion density and temperature on electrostatic waves in a dusty plasma having trapped ions are investigated by numerical calculation. This work ...
Mirror mode structures and ELF plasma waves in the Giacobini-Zinner magnetosheath
Mirror mode structures ELF plasma waves Giacobini-Zinner magnetosheath
2009/11/13
We show evidence for mirror mode structures at comet Giacobini-Zinner. These are plasma structures with alternating high ß and low ß regions driven unstable when ß /ß<par...
Characteristics of electrostatic solitary waves observed in the plasma sheet boundary:Statistical analyses
electrostatic solitary waves plasma sheet boundary Statistical analyses
2009/11/13
We present the characteristics of the Electrostatic Solitary Waves (ESW) observed by the Geotail spacecraft in the plasma sheet boundary layer based on the statistical analyses. We also discuss the re...
The role of nonlinear Landau damping and the bounced motion of protons in the formation of dissipative structures in the solar wind plasma
nonlinear Landau damping bounced motion of protons dissipative structures solar wind plasma
2009/11/13
The present work examines the effects arising from the nonlinear Landau damping and the bounced motion of protons (trapped in the mirror geometry of the geomagnetic field) in the formation of nonlinea...