X Dong (School of Space and Environment; Beihang University; Beijing China), MW Dunlop (STFC Rutherford Appleton Lab., and School of Space and Environment; Beihang University; Beijing China), T Wang (STFC Rutherford Appleton Lab.), J Cao (School of Space and Environment; Beihang University; Beijing China), KJ Trattner (LASP University of Colorado; Boulder CO USA), R Bamford (STFC Rutherford Appleton Lab.), CT Russell (Department of Earth), R Bingham (STFC Rutherford Appleton Lab.), RJ Strangeway (Department of Earth), RC Fear (Department of Physics and Astronomy; University of Southampton; Southampton UK), BL Giles (NASA Goddard Space Flight Center; Greenbelt MD USA), RB Torbert (Institute for the Study of Earth)