Zobrazeno 1 - 10 of 44 pro vyhledávání: '"Jean-Paul Villain"'
1
Variations in the polar cap area during two substorm cycles
Autor: R. A. Greenwald, Mitchell J. Brittnacher, Jean-Paul Villain, Kjellmar Oksavik, Steve Milan, Mark Lester, George J. Sofko, Stanley W. H. Cowley
Publikováno v: Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2003, 21 (5), pp.1121-1140
Scopus-Elsevier
Annales Geophysicae, Vol 21, Pp 1121-1140 (2003)
Annales Geophysicae, Vol 21, Iss 5, Pp 1121-1140 (0000)
This study employs observations from several sources to determine the location of the polar cap boundary, or open/closed field line boundary, at all local times, allowing the amount of open flux in the magnetosphere to be quantified. These data sourc
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a473413147c5e315b2ca7b639db620b0
https://www.ann-geophys.net/21/1121/2003/
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2
HF radar observations of high-aspect angle backscatter from the E-region
Autor: Stephen E. Milan, T. R. Robinson, Jean-Paul Villain, M. V. Uspensky, Mark Lester, Tim K. Yeoman
Publikováno v: Annales Geophysicae, Vol 22, Iss 3, Pp 829-847 (2004)
Annales Geophysicae, Vol 22, Pp 829-847 (2004)
We present evidence for the observation of high-aspect angle HF radar backscatter from the auroral electrojets, and describe the spectral characteristics of these echoes. Such backscatter is observed at very near ranges where ionospheric refraction i
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::699384cd03297c7b9ccbed5766f8f7e9
https://www.ann-geophys.net/22/829/2004/
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3
Comparison of DMSP cross-track ion drifts and SuperDARN line-of-sight velocities
Autor: Marc R. Hairston, R. A. Drayton, Jean-Paul Villain, A. V. Koustov
Publikováno v: Annales Geophysicae, Vol 23, Iss 7, Pp 2479-2486 (2005)
Annales Geophysicae, Vol 23, Pp 2479-2486 (2005)
Scopus-Elsevier
Cross-track ion drifts measured by the DMSP satellites are compared with line-of-sight SuperDARN HF velocities in approximately the same directions. Good overall agreement is found for a data set comprising of 209 satellite passes over the field of v
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::14a21a84921510f9d9c3df91c32e2a9a
http://www.ann-geophys.net/23/2479/2005/angeo-23-2479-2005.pdf
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4
Extension of SuperDARN at Dome C
Autor: Jean-Paul Villain, Jean-Claude Cerisier, E. Amata
Publikováno v: EAS Publications Series. 14:107-112
The SuperDARN (Super Dual Auroral Radar Network) experiment is a multinational effort to develop chains of coherent HF radars world wide in order to obtain instantaneous large scale coverage of the magnetospheric plasma convection at high spatial and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c140751e0d4ada3dad4a7cc8d64c2db
https://doi.org/10.1051/eas:2005017
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5
The excitation of convection in the cusp region as observed by the SuperDARN radars
Autor: R. A. Greenwald, J. R. Dudeney, Mark Lester, Steve Milan, R. P. Lepping, Jean-Paul Villain, George J. Sofko
Publikováno v: Advances in Space Research. 27:1373-1376
SuperDARN observations from the interval 1330 UT to 1500 UT, 17 April 1996, are presented. During this interval, five radars covered 12 hours of magnetic local time on the dayside, including the cusp region, in the Northern hemisphere, and one observ
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::78009f399dcef6ffcf08bee052c26a38
https://doi.org/10.1016/s0273-1177(01)00028-x
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6
The influence of the interplanetary medium on SuperDARN radar scattering occurrence
Autor: P. Ballatore, Jean-Paul Villain, Nicole Vilmer, M. Pick
Publikováno v: Annales Geophysicae
Annales Geophysicae, European Geosciences Union, 2001, 18 (12), pp.1576-1583. ⟨10.1007/s00585-001-1576-2⟩
Annales Geophysicae, Vol 18, Pp 1576-1583 (2000)
Annales Geophysicae, Vol 18, Iss 12, Pp 1576-1583 (0000)
The effects of the characteristics of the interplanetary medium on the radar scattering occurrence, related to the whole array of SuperDARN radars installed in the Northern Hemisphere, have been studied over a two-year period. Statistically significa
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::928b0667f7114730ec6d6481651c93bd
https://doi.org/10.1007/s00585-001-1576-2
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7
High-time resolution conjugate SuperDARN radar observations of the dayside convection response to changes in IMF By
Autor: Alan S. Rodger, Jean-Paul Villain, Gareth Chisham, Michael Pinnock
Publikováno v: Annales Geophysicae. 18:191-201
We present data from conjugate SuperDARN radars describing the high-latitude ionosphere's response to changes in the direction of IMF By during a period of steady IMF Bz southward and Bx positive. During this interval, the radars were operating in a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7438fb12e2b37e6ccb6c5c4411ba8282
https://doi.org/10.1007/s00585-000-0191-y
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8
Convective response to a transient increase in dayside reconnection
Autor: William A. Bristow, James A. Slavin, J. Michael Ruohoniemi, George J. Sofko, Jean Paul Villain, K. B. Baker, Mark Lester, R. A. Greenwald
Publikováno v: Journal of Geophysical Research: Space Physics. 104:10007-10015
Measurements with five of the northern hemisphere Super Dual Auroral Radar Network (SuperDARN) radars have yielded a detailed temporal and spatial view of the evolution of a dayside convection enhancement, which we associate with a transient increase
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3f721ed3863b966c2f5f865f75ab0d14
https://doi.org/10.1029/98ja02723
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10
Solar-wind-driven pulsed magnetic reconnection at the dayside magnetopause, Pc5 compressional oscillations, and field line resonances
Autor: Jean-Paul Villain, George J. Sofko, P. Prikryl, E. Friis-Christensen, C. W. S. Ziesolleck, R. A. Greenwald
Publikováno v: Journal of Geophysical Research: Space Physics. 103:17307-17322
A series of observations by satellites of the solar wind and magnetosphere, by HF radars of the F region, and by ground-based magnetometers of E region currents are presented to show the correlation between quasiperiodic fluctuations in the solar win
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5f80128c8540e7fd2e79df3bb425fbbb
https://doi.org/10.1029/97ja03595
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