Polar Topside Ionosphere During Geomagnetic Storms: Comparison
Radio Science RESEARCH ARTICLE Polar Topside Ionosphere During Geomagnetic Storms: 10.1029/2018RS006589 Comparison of ISIS-II With TDIM Special Section: J. J. Sojka1,2 , D. Rice2 , V. Eccles2 , M. David1 , R. W. Schunk1 , R. F. Benson3 , URSI General Assembly and and H. G. James4 Scientific Symposium (2017) 1Center for Atmospheric and Space Sciences, Utah State University, Logan, UT, USA, 2Space Environment Corporation, 3 Key Points: Logan, UT, USA, Geospace Physics Laboratory, Heliophysics Science Division, NASA Goddard Space Flight Center, • The paper focuses on prestorm and Greenbelt, MD, USA, 4Natural Resources Canada Geomagnetic Laboratory, Ottawa, Ontario, Canada main phase topside ionospheric response to a mild and a severe geomagnetic storm Abstract Space weather deposits energy into the high polar latitudes, primarily via Joule heating that is • Simulations from an extensively used associated with the Poynting flux electromagnetic energy flow between the magnetosphere and F region model, TDIM, are compared fl fi to ISIS-II topside ionosphere ionosphere. One way to observe this energy ow is to look at the ionospheric electron density pro le observations (EDP), especially that of the topside. The altitude location of the ionospheric peak provides additional • Surprisingly, the TDIM is unable to information on the net field-aligned vertical transport at high latitudes. To date, there have been few simulate the observed storm response while satisfactorily studies in which physics-based ionospheric model storm simulations have been compared with topside simulating the prestorm topside EDPs. A rich database of high-latitude topside ionograms obtained from polar orbiting satellites of the International Satellites for Ionospheric Studies (ISIS) program exists but has not been utilized in comparisons with physics-based models.
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