Radoslav Bucik, Max Planck Institute for Solar System Research, Katlenburg-Lindau, Germany; University of Kiel, Kiel, Germany, Sargam M Mulay, Inter-University Centre for Astronomy and Astrophysics, Pune, India, Glenn M Mason, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States and Nariaki Nitta, Lockheed Martin Advanced Technology Center, Palo Alto, CA, United States