搜索结果: 136-149 共查到“知识库 电离层物理学”相关记录149条 . 查询时间(2.17 秒)
利用一维自洽的时变极区电离层模型 ,研究极隙区极光粒子沉降对极区电离层 F层电子
密度影响的时变过程。假设一维时变电离层模型描述的磁流管中 F层等离子体在对流作用下
经过极隙区 ,随对流路径的不同 ,磁流管在极隙区经历的时间不同 ,以此考察极光粒子沉降作用
下电离层随时间的演化过程。数值计算结果表明 ,当磁流管在极隙区停留的时间足够长 , F层
电子密度能显著增大。然而在磁流管经历极隙区实...
南极中山站电离层 F2层临界频率变化特征
电离层 南极 中山站 fo F2
2014/2/21
对南极中山站数字式电离层测高仪1995～2002年观测数据的月中值进行了统计分析 ,揭示了中山站电离
层 F2层临界频率( fo F2 )的主要特征: fo F2 存在明显的日变化和年变化;日变化存在“磁中午异常”现象;年变化中中
午 fo F2 在太阳活动低年不出现“冬季异常” ,在太阳活动高年出现“半年异常” ,即两分点高于两至点.本文结合中山
站所处的地理位置 ,考虑太阳辐射电离、磁层...
Remote sensing lower thermosphere wind profiles using non-specular meteor echoes
wind profiles non-specular meteor echoes
2017/3/22
This article describes a new method of measuring wind
velocity profiles between 93 km and 110 km altitude by
tracking non-specular meteor echoes as neutral winds
transport the plasma trails. This r...
Structure functions and intermittency in ionospheric plasma turbulence
ionospheric plasma turbulence Structure functions and intermittency
2017/3/22
Low frequency electrostatic turbulence in the ionospheric
E-region is studied by means of numerical and experimental
methods. We use the structure functions of the
electrostatic potential as a diag...
Low-frequency electrostatic waves in the ionospheric E-region: a comparison of rocket observations and numerical simulations
Ionosphere Space plasma physics
2017/3/22
Low frequency electrostatic waves in the lower
parts of the ionosphere are studied by a comparison of observations
by instrumented rockets and of results from numerical
simulations. Particular atte...
Saturation of the Farley-Buneman instability via three-mode coupling
Farley-Buneman instability coupling
2017/3/22
Characteristics of type-1 radar echoes obtained from the E region ionosphere have yet
to be conclusively explained. The dynamical properties of the saturated state of the FarleyBuneman
instability a...
Mortality of Workers Exposed to Ionizing Radiation at the French National Electricity Company
Ionizing Radiation Mortality of Workers Exposed
2013/12/6
observed among the Hiroshima and Nagasaki atomic bombsurvivors and among patients exposed for medical reasons,both populations having received relatively high doses[Boice et al., 1987; Preston et al.,...
Ion thermal effects on E-region instabilities: linear theory
E-region electrojet Ionospheric irregularities
2017/3/22
Linear instabilities and turbulent processes in ionospheric electrojets lead to the formation of plasma density
irregularities which create strong radar reflections. Studies of these irregularities h...
Ablation of micrometeoroids between 70 and 130 km altitude in the atmosphere
creates plasma columns with densities exceeding the ambient ionospheric electron density
by many orders of magnitude. Den...
Evolution of Electron Phase-Space Holes in a 2D Magnetized Plasma
Electron Phase-Space Holes 2D Magnetized Plasma
2017/3/22
The nonlinear stage of the two-stream instability in a 2D magnetized plasma produces electron
phase-space tubes, the counterpart of phase-space holes in a 1D plasma. These tubes align primarily
perp...
Electron phase-space holes are regions of depleted
electron density commonly generated during the nonlinear
stage of the two-stream instability. Recently, bipolar
electric field structures — a sign...
Evidence and effects of a wave-driven nonlinear current in the equatorial electrojet
Evidence equatorial electrojet
2017/3/22
Ionospheric two-stream waves and gradient-drift waves nonlinearly
drive a large-scale (D.C.) current in the E-region ionosphere. This current flows
parallel to, and with a comparable magnitude to, t...