Angeline G Burrell, US Naval Research Laboratory, Washington, DC, United States, Gareth Chisham, NERC British Antarctic Survey, Cambridge, United Kingdom, Steve E. Milan, University of Leicester, Leicester, United Kingdom, Liam M Kilcommons, University of Colorado at Boulder, Boulder, CO, United States, Yun-Ju Chen, University of Texas at Dallas, William B. Hanson Center for Space Sciences, Richardson, TX, United States and Evan G Thomas, Dartmouth College, Thayer School of Engineering, Hanover, NH, United States