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This article proposes a new method to evaluate basic characteristics of the dynamics of a coherent plasma structure (blob). With this method, one can evaluate the propagation angle of a blob in a two-dimensional plasma cross section as well as the blob velocity, size, and amplitude from one-dimensional data. The method is applied to blob measurements from the Lithium beam emission spectroscopy (Li-BES) system in ASDEX-Upgrade (AUG). Statistical features of the observed blob velocities, anglesdoi:10.1063/1.4893482 pmid:25173269 fatcat:qbomum62vnchvmlfli2el76jde