Fennell, J. F.,
Co-Authors: J. L. Roeder, J. B. Blake,R. Selesnick, M. Carter, and G. D. Reeves,
Title: THE ENERGETIC ELECTRON AND ION RESPONSE TO THE GEM MAGNETIC STORMS: HEO AND POLAR SATELLITE OBSERVATIONS,
Reference: S-RAMP: STEP - Results, Applications and Modeling Phase, Sapporo, Japan, October 2-6, 2000.
Reference Type: Contributed Talk
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Abstract:
We combine the energetic electron observations from Polar and HEO (94-026, 95-034, and 97-068) to study the magnetosphere response to the GEM Inner Magnetosphere Campaign Storms of May 2-4, August 26, September 25 and October 19, 1998. The observations are taken by high-altitude high-inclination satellites at energies > 100 keV from Polar HEO satellites. The HEO (94-026, 95-034, and 97-068) satellites are in ~12 hour orbits at different local times while Polar is in an 18 hour orbit. The HEO coverage occurs roughly in the pre-noon/pre-midnight, post-noon/post-midnight and dawn/ dusk regions of the inner magnetosphere. Polar covers the pre-noon/pre-midnight region. HEO 94-026 and 95-034 provide coverage generally for L > 4 while HEO 97-068 covers L> 2 and Polar covers L>3. These data are combined to provide a picture of the evolution of the energetic electrons with time, local time, L, and energy for the GEM storms. These combined observations will be presented an! d discussed in terms of the development of the storm from the electron perspective from low to mid latitudes. We will discuss the generation of relativistic electron enhancements in the inner magnetosphere in terms of the solar wind conditions. We will show evidence that the storm time energetic electron angular distributions are nearly isotropic. We will also show examples of the electron phase space densities and discuss the limitations of such analyses imposed by current magnetic field models. Finally, we will use the combined ion data to show the evolution in local time of the ring current ion radial profiles during the storms.
