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In the present work, we analyze a filament eruption associated with an ICMEthat arrived at L1 on August 5th, 2011. In multi-wavelength SDO/AIA images,three plasma parcels within the filament were tracked at high-cadence along thesolar corona. A novel absorption diagnostic technique was applied to thefilament material travelling along the three chosen trajectories to compute thecolumn density and temperature evolution in time. Kinematics of the filamentarymaterial were estimated using STEREO/EUVI and STEREO/COR1 observations. TheMichigan Ionization Code used inputs of these density, temperature, and speedprofiles for the computation of ionization profiles of the filament plasma.Based on these measurements we conclude the core plasma was in near ionizationequilibrium, and the ionization states were not frozen-in at the altitudeswhere they were visible in absorption in AIA images. Additionally, we reportthat the filament plasma was heterogeneous, and the filamentary material wascontinuously heated as it expanded in the low solar corona.

Tracking Filament Evolution in the Low Solar Corona using Remote-Sensing and In-situ Observations