Zobrazeno 1 - 10
of 142
pro vyhledávání: '"George J. Sofko"'
Autor:
Anthony Walker, George J. Sofko
Publikováno v:
Annales Geophysicae, Vol 34, Pp 55-65 (2016)
When studying magnetospheric convection, it is often necessary to map the steady-state electric field, measured at some point on a magnetic field line, to a magnetically conjugate point in the other hemisphere, or the equatorial plane, or at the posi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4d94e365907610adbc0e1267178ebb0
https://doi.org/10.5194/angeo-34-55-2016
https://doi.org/10.5194/angeo-34-55-2016
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)
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/
https://www.ann-geophys.net/21/1121/2003/
Publikováno v:
Annales Geophysicae, Vol 27, Iss 1, Pp 31-57 (2009)
Annales Geophysicae, Vol 27, Pp 31-57 (2009)
Annales Geophysicae, Vol 27, Pp 31-57 (2009)
Cases of mesoscale cloud bands in extratropical cyclones are observed a few hours after atmospheric gravity waves (AGWs) are launched from the auroral ionosphere. It is suggested that the solar-wind-generated auroral AGWs contribute to processes that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12057ebcdd1122504bfcea2fe620d4af
https://doi.org/10.5194/angeo-27-31-2009
https://doi.org/10.5194/angeo-27-31-2009
Publikováno v:
Annales Geophysicae, Vol 26, Iss 4, Pp 823-841 (2008)
Annales Geophysicae, Vol 26, Pp 823-841 (2008)
Annales Geophysicae, Vol 26, Pp 823-841 (2008)
Accurately mapping the location of ionospheric backscatter targets (density irregularities) identified by the Super Dual Auroral Radar Network (SuperDARN) HF radars can be a major problem, particularly at far ranges for which the radio propagation pa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39aa73539b977440460c73556b8562c5
http://www.ann-geophys.net/26/823/2008/angeo-26-823-2008.pdf
http://www.ann-geophys.net/26/823/2008/angeo-26-823-2008.pdf
Autor:
Robert Schwab, Masakazu Watanabe, Kathryn A. McWilliams, John C. Foster, George J. Sofko, Chao-Song Huang
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 69:1213-1232
During magnetically disturbed conditions, the auroral zone is occupied by widespread aurora mostly created by precipitating primary auroral electrons associated with upward field-aligned currents (FACs) that are highly variable in space and time. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0af7fc22912404f8974d9d55ea2e8d66
https://doi.org/10.1016/j.jastp.2006.10.017
https://doi.org/10.1016/j.jastp.2006.10.017
Autor:
J. S. Murphree, W. W. Liu, L. L. Cogger, M. Syrjasuo, George J. Sofko, James F. Spann, Robert Rankin, Thomas J. Immel, Eric Donovan, Michael G. Henderson, Stephen B. Mende, C. Y. Tu, John W. Bonnell, John B. Sigwarth, Aaron J. Ridley, Tuija Pulkkinen, Mark Lester, Emma Spanswick, T. S. Trondsen, P. T. Jayachandran
Publikováno v:
Advances in Space Research. 40:409-418
The overarching objective of the ILWS Geospace program is to facilitate system level science. This demands synoptic observations such as global auroral imaging. At present, there is no funded mission during ILWS that incorporates a global auroral ima
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1600a835c8e88dc4fd7aa3585b96566
https://doi.org/10.1016/j.asr.2006.09.028
https://doi.org/10.1016/j.asr.2006.09.028
Autor:
T. P. O'Brien, Dimitris Vassiliadis, Marc Lessard, Richard M. Thorne, David J. Knudsen, Robert Rankin, Brian Fraser, David Boteler, I. Thomson, K. Balmain, R. Fedosejeves, Ian R. Mann, John R. Wygant, C. Unick, T. M. Loto'aniu, Geoffrey D. Reeves, Janet C. Green, Sebastien Bourdarie, George J. Sofko, Vania K. Jordanova, Danny Summers, Z. C. Dent, J. H. Clemmons, David K. Milling, L. M. Kistler, J. F. Fennell, A. Kale, I. J. Rae, Louis Ozeke, Aaron J. Ridley, Terrance Onsager, Andrew W. Yau, Ying Y. Tsui, J. B. Blake, Alex Degeling
Publikováno v:
Advances in Space Research. 38:1838-1860
The outer radiation belt injection, transport, acceleration and loss satellite (ORBITALS) is a small satellite mission proposed as a Canadian contribution to the satellite infrastructure for the International Living With a Star (ILWS) program. The OR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aedc499975d9647fcb16c3850e1cf2a1
https://doi.org/10.1016/j.asr.2005.11.009
https://doi.org/10.1016/j.asr.2005.11.009
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
https://doi.org/10.1016/s0273-1177(01)00028-x
Autor:
Marc R. Hairston, R. A. Greenwald, D. André, A. V. Koustov, George J. Sofko, J. M. Ruohoniemi, Chao Song Huang
Publikováno v:
Journal of Geophysical Research: Space Physics. 105:27095-27107
During northward interplanetary magnetic field (IMF), it is generally believed that ionospheric convection appears as a four-cell structure for |Bz/By| > 1 and as a distorted two-cell structure for |Bz/By| 1 on November 11, 1998. We show in detail th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c21c4647b1ae2e23b70460867c9170ce
https://doi.org/10.1029/2000ja000163
https://doi.org/10.1029/2000ja000163
Publikováno v:
Annales Geophysicae, Vol 18, Pp 1550-1559 (2000)
Annales Geophysicae, Vol 18, Iss 12, Pp 1550-1559 (0000)
Annales Geophysicae, Vol 18, Iss 12, Pp 1550-1559 (0000)
Based on modeling of the perturbations in power and elevation angle produced by travelling ionospheric disturbances (TIDs), and observed by the Super Dual Auroral Radar Network, procedures for determining the TID properties are suggested. These proce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4c289808b73d485f4e9ab227d3727a4
https://www.ann-geophys.net/18/1550/2000/angeo-18-1550-2000.pdf
https://www.ann-geophys.net/18/1550/2000/angeo-18-1550-2000.pdf