Results 101 to 110 of about 77,336 (163)

Effects of energetic electrons on the electrodynamics in the ionosphere [PDF]

, 2004
International audienceFrom the observations by the PIXIE and UVI cameras on board the Polar satellite, we derive global maps of the precipitating electron energy spectra from less than 1keV to 100keV.
Rosenberg, T. J., D. L. Detrick, Aksnes, A., Detrick, D.L., Rosenberg, T.J., A. Aksnes, J. Stadsnes, N. Østgaard, G. A. Germany, Østgaard, N., T. J. Rosenberg, Lu, G., Schulz, M, M. Schulz, Detrick, D. L., Stadsnes, J., Germany, G. A., R. R. Vondrak, Vondrak, R.R., Vondrak, R. R., Germany, G.A., G. Lu   +21 more
core   +2 more sources

Sferic propagation in the cutoff region of the earth-ionosphere waveguide [PDF]

, 2004
Thesis (M. Eng. and S.B.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2004.Includes bibliographical references (leaves 93-96).The waveguide cutoff phenomenon provides information about the height of a ...
Surana, Kunal K. (Kunal Krishna), 1979-
core  

Lower ionospheric modification by lightning-EMP: simulation of the night ionosphere over the United States [PDF]

, 2001
It has recently been suggested that successive intense lightning‐electromagnetic pulse (EMP) events could cause significant large‐scale changes to the properties of the nighttime lower ionosphere.
Cho, Mengu, Rodger, Craig J., Clilverd, Mark A., Rycroft, Michael J., Mengu Cho, Craig J. Rodger, Mark A. Clilverd, Michael J. Rycroft   +7 more
core   +1 more source

Seasonal variations of nighttime D-region ionosphere in 2013 solar maximum observed from a low-latitude station [PDF]

, 2018
We present the observation of tweek atmospherics with harmonics m = 1–8 during the solar maximum year, 2013, at Tay Nguyen University, Vietnam (Geog. 12.65° N, 108.02° E). The analysis of 33,690 tweeks on ten international quiet days during 2 months each
Thu, Nguyen N, Nguyen-Luong, Quang, Ha, Tran Q, Tan, Le M   +3 more
core   +1 more source

Nighttime ionosphere caused by meteoroid ablation and solar wind electron-proton-hydrogen impact on Mars: MEX observation and modeling

, 2013
We report that radio science (RS) experiment onboard Mars Express (MEX) has observed three plasma layers in the nighttime ionosphere of Mars at altitudes ~80–100 km, ~120 km, and ~160 km, which are reproduced by model calculation due to impact of ...
Molina-Cuberos, G. J., Pandya, B. M., Haider, S. A.   +2 more
core   +1 more source

An observing system simulation experiment for FORMOSAT-5/AIP probing topside ionospheric plasma irregularities by using DEMETER/IAP

Terrestrial, Atmospheric and Oceanic Sciences, 2017
The ion density probed by IAP (Instrument d’Analyse du Plasma) on board the DEMETER (Detection of Electro-Magnetic Emissions Transmitted from Earthquake Regions) satellite is used to find whether the science payload of Advanced Ionospheric Probe (AIP) on
Jann-Yenq Liu, Yang-Yi Sun, Chi-Kuang Chao, Shih-Ping Chen, Michel Parrot   +4 more
doaj   +1 more source

Variations of electron density and temperature in ionosphere based on the DEMETER ISL data

, 2010
International audienceObservations of the Langmuir Probe Instrument (ISL, Instrument Sonde de Langmuir) onboard the DEMETER satellite during four years from 2006 to 2009 were used to analyze the tempo-spatial variations of electron density (Ne) and ...
Yufei He, Zhu, Rong, Rong Zhu, Parrot, Michel, Dongmei Yang, M Parrot, Jiadong Qian, He, Yufei, Qian, Jiadong, Yang, Dongmei   +9 more
core   +1 more source

Midlatitude nighttime D region ionosphere variability on hourly to monthly time scales

, 2010
Significant temporal variability of the nighttime D region is well known, but its inaccessibility means that the time scales, magnitudes, and sources for that variability are not well understood.
Steven A. Cummer, Cummer, SA, Feng Han, Han, F   +3 more
core   +1 more source

Nighttime magnetic field fluctuations in the topside ionosphere at midlatitudes and their relation to medium‐scale traveling ionospheric disturbances: The spatial structure and scale sizes

, 2015
Previous studies suggested that electric and/or magnetic field fluctuations observed in the nighttime topside ionosphere at midlatitudes generally originate from quiet time nocturnal medium-scale traveling ionospheric disturbances (MSTIDs).
Michaelis, Ingo, Claudia Stolle, Guram Kervalishvili, Jaeheung Park, Lühr, Hermann, Rauberg, Jan, Kwak, Young-Sil, Ingo Michaelis, Park, Jaeheung, Young‐Sil Kwak, Jan Rauberg, Hermann Lühr, Stolle, Claudia (Prof. Dr.), Kervalishvili, Guram N. (Dr.)   +13 more
core   +1 more source

Multi-process driven unusually large equatorial perturbation electric fields during the April 2023 geomagnetic storm

Frontiers in Astronomy and Space Sciences
The low latitude ionosphere and thermosphere are strongly disturbed during and shortly after geomagnetic storms. We use novel Jicamarca radar measurements, ACE satellite solar wind, and SuperMAG geomagnetic field observations to study the electrodynamic ...
Bela G. Fejer, Sophia R. Laranja, Sophia R. Laranja, Percy Condor   +3 more
doaj   +1 more source