Senbei Du, University of Alabama in Huntsville, Department of Space Science, Huntsville, AL, United States, Gary Paul Zank, Univ of Alabama, Huntsville, Huntsville, AL, United States, Xiaocan Li, Los Alamos National Laboratory, Los Alamos, NM, United States and Fan Guo, Los Alamos National Lab, Los Alamos, NM, United States