Submission_time: 2013/03/06 03:01 EST
Working_Group 1st Choice:WG1
Working_Group 2nd Choice:WG3
Title:Do we need to correct projection effect for halo CMEs in terms of space weather forecasting
Abstract:Halo CMEs are thought to suffer from large projection effect. It is undoubted that we need to correct the projection effect to better understand the dynamic behavior of CMEs. However, in terms of space weather forecasting, whether or not it is needed to be corrected is questionable. What kinds of halo CMEs need the correction and what kinds do not? Which is the best and simplest model could be used for the correction? These questions are investigated through a statistical study of full halo CMEs. In the presentation, we will first show a list of full halo CMEs, in which CME de-projected parameters derived from GCS model and ice-cream cone model are given. Then a comparison between the projected de-projected parameters is presented. Some conclusions are reached. Except to address the above questions, the aim of this presentation is to show colleagues what we (the STEP group at USTC) can do, what we can contribute to the ISEST program and the communities, and what we already have.