نتایج جستجو برای: plasmapause
تعداد نتایج: 153 فیلتر نتایج به سال:
The Extreme Ultraviolet Imager (EUV) of the IMAGE Mission will study the distribution of He in Earth’s plasmasphere by detecting its resonantly-scattered emission at 30.4 nm. It will record the structure and dynamics of the cold plasma in Earth’s plasmasphere on a global scale. The 30.4-nm feature is relatively easy to measure because it is the brightest ion emission from the plasmasphere, it i...
The Radio Plasma Imager (RPI) on the IMAGE mission operates like a radar by transmitting and receiving coherent electromagnetic pulses. The RPI is designed to receive mirror-like (specular) reflections and coherent scatter returns. Long-range echoes of electromagnetic sounder waves are reflected at remote plasma cutoffs. Thus, analyses of RPI observations will yield the plasma parameters and di...
[1] We investigated a Pi2 pulsation that occurred at 0538 UT on 20 September 1995, using data from ground stations and the ETS-VI and EXOS-D satellites. Since ground stations at L = 1.45 12.6 and the two satellites were located at 7–10 hours of magnetic local time (MLT), we could investigate characteristics of the morning side Pi2 pulsation in detail. We also examined geomagnetic field data fro...
[1] We present a statistical analysis on the plasmaspheric mass density derived from the field line resonance (FLR) observations by the Mid-continent MAgnetoseismic Chain (McMAC). McMAC consists of nine stations in the United States and Mexico along the 330 magnetic longitude, spanning L-values between 1.5 and 3.4. Using the gradient method and an automated procedure for FLR detection, we studi...
We present a unique 2 h ground-based observation of concurrent magnetospheric hiss, chorus, VLF triggered emissions as well as ELF/VLF signals generated locally by the High Frequency Active Auroral Research Program (HAARP) facility. Eccentricity of observed wave polarization is used as a criteria to identify magnetospheric emissions and estimate their ionospheric exit points. The observations o...
Predicting the electron population of Earth’s ring current during geomagnetic storms still remains a challenging task. In this work, we investigate sensitivity 10 keV electrons to different driving processes, parameterised by Kp index, several moderate and intense storms. Results are validated against measurements from Van Allen Probes satellites. Perturbing index allows us identify most domina...
Plasmaspheric hiss is one of the most important plasma waves in Earth's magnetosphere to contribute radiation belt dynamics by pitch-angle scattering energetic electrons via wave-particle interactions. There growing evidence that temporal and spatial variability interactions are factors construction diffusion-based models belts. Hiss amplitudes thought be coherent across large distances on long...
The geospace plume couples the ionosphere, plasmasphere, and magnetosphere from sub-auroral regions to magnetopause, on polar field lines, into magnetotail. We describe Van Allen Probes observations of ionospheric O+ ions at altitudes 3–6 R E in near vicinity noon post-noon sector. temporal variation warm ion fluxes observed as a function time moving spacecraft is complicated by changing positi...
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