Correlative Study of Enhanced Plasmaspheric Density Structures Observed by IMAGE RPI and EUV

Physics

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2730 Magnetosphere: Inner, 2740 Magnetospheric Configuration And Dynamics, 2768 Plasmasphere

Scientific paper

Thirty years of space and ground-based observations have described many of the characteristics of so called "detached" plasmaspheres. These regions of enhanced electron number density in the plasma trough are clearly visible in many IMAGE Radio Plasma Imager (RPI) dynamic spectrograms. Analyses of convection and corotational E-field models have suggested that these density structures are associated with sun-pointing plasma convection tails. The RPI and the Extreme Ultraviolet Imager (EUV) on the polar-orbiting IMAGE spacecraft are now providing the means of observing both the local and global structure of these tails. We confirm the interpretation of these structures as plasma convection tails and provide insights into the latitudinal extent of these density features along L shells, their life-time, and their morphology during times of reduced substorm activity.

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