Results 281 to 290 of about 126,546 (328)
Ionospheric Feedback Instability in the Coupling of Magnetosphere-Ionosphere [PDF]
Chinese Physics Letters, 2003 The ionospheric feedback instability is discussed by using the conductivity argument. We give an exact quantitative description to show that the free energy for this instability comes from the reduction of the Joule dissipation produced by the pre-existing convection electric field through self-consistent changes in ionization and conductivity due to ...
Cao Jinbin, Wang Xu-Yu, Wang Xu-Yu
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Ionospheric variability and the international reference ionosphere
Advances in Space Research, 2004Abstract The International Reference Ionosphere (IRI) has, for many years now, proven to be a valuable resource for modelling the average ionosphere. Through a series of workshops, improvements and additions have been added, further extending the value obtained from the IRI. Currently, ionospheric variability is receiving attention.
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Validation of Ionospheric Models [PDF]
, 1998 Abstract : During the period of April 2000 through March 2001, research efforts have continued in the Validation of Ionospheric Models. These efforts included testing and utilizing the Ionospheric Forecast Model (IFM) and the Coupled ionosphere Thermosphere Electrodynamic Forecast Model (CITEFM) to define low latitude ionospheric characteristics. Other
Neil J. Grossbard +2 more
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Emissions of ionospheric Alfvén resonator and ionospheric conditions
Journal of Atmospheric and Solar-Terrestrial Physics, 2014Abstract We analyze continuous magnetic observations of ionospheric Alfven resonator (IAR) emissions at mid-latitude observatory Mondy. The measurements were by a LEMI-30 search-coil magnetometer covering the period from March 2010 to May 2011. The results are compared with data from simultaneous ionospheric sounding data and International Reference ...
Alexander Potapov +4 more
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Analysis of ionospheric models during ionospheric disturbances
2007 Asia-Pacific Conference on Applied Electromagnetics, 2007This paper describes an analysis of ionospheric models compared with real data during the occurrence of travelling ionospheric disturbances. GPS data was taken from Parit Raja Station (1deg 52' N, 103deg 06' E) in Southern Malaysia. Comparison was made from collected data during the geomagnetic quiet and storm days. Ionospheric models i.e.
Dayang Azra Awang Mat +4 more
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On the ionospheric structure of Titan
Planetary and Space Science, 2009Abstract In this study we present data from 17 Titan flybys showing that solar photons are the main ionisation source of Titan's dayside atmosphere. This is the first comprehensive study of Solar Zenith Angle (SZA) dependence of the electron number density and electron temperature at the ionospheric peak.
P. Garnier +7 more
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Advances in Space Research, 2004
Abstract Photometers monitoring oxygen night airglow emissions and a Canadian advanced digital ionosonde (CADI) have given a complementary view of the polar ionosphere over Eureka, Canada (80°N, 86°W) through each winter since 1991. The 630 nm [O] emission intensity, in particular, is seen to be directly proportional to the f o F2 critical ...
John MacDougall +3 more
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Abstract Photometers monitoring oxygen night airglow emissions and a Canadian advanced digital ionosonde (CADI) have given a complementary view of the polar ionosphere over Eureka, Canada (80°N, 86°W) through each winter since 1991. The 630 nm [O] emission intensity, in particular, is seen to be directly proportional to the f o F2 critical ...
John MacDougall +3 more
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Physical Review, 1936
There are two well-defined regions in the lower part of the ionosphere. One of these (the $D$ region) extends from 35-65 km, the other (the $C$ region) lies between 2-30 km. They have been detected by the use of a very short pulse of the order of 3 microseconds and a receiving set with a small time lag.
R. C. Colwell, A. W. Friend
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There are two well-defined regions in the lower part of the ionosphere. One of these (the $D$ region) extends from 35-65 km, the other (the $C$ region) lies between 2-30 km. They have been detected by the use of a very short pulse of the order of 3 microseconds and a receiving set with a small time lag.
R. C. Colwell, A. W. Friend
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2005
The ionospheric glow is due to the desexcitation of neutral or ion molecules and atoms. Its computation requires the knowledge of a number of parameters including the production of the excited species. Several processes occur: resonant and fluorescent scattering, chemical reactions, recombination, photo-absorption or collisions.
Lilensten, Jean +5 more
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The ionospheric glow is due to the desexcitation of neutral or ion molecules and atoms. Its computation requires the knowledge of a number of parameters including the production of the excited species. Several processes occur: resonant and fluorescent scattering, chemical reactions, recombination, photo-absorption or collisions.
Lilensten, Jean +5 more
openaire +2 more sources