1. Te Pūnaha Ātea-Auckland Space Institute, Department of Physics, The University of Auckland, Auckland 1010, New Zealand
2. Te Pūnaha Ātea-Auckland Space Institute, Department of Engineering Science, The University of Auckland, Auckland 1010, New Zealand
3. Space Plasma, Power and Propulsion Laboratory, Research School of Physics, The Australian National University, Canberra ACT 2601, Australia