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Testing the asymmetric cone model for halo CMEs using STEREO/SECCHI coronagraphic observations

Michalek, Grzegorz; Nicewicz, Janusz

Space weather is significantly controlled by halo coronal mass ejections (HCMEs) originating close to the central meridian and directing toward the Earth. Unfortunately, coronagraphic observations (especially for HCMEs) are subject to a projection effect which makes it impossible to determine the true radial velocity and width of CMEs. However, th…