1. Universities Space Research Association, NASA GRC, Cleveland, Ohio, USA
2. Department of Mechanical and Aerospace Engineering, Case Western Reserve University, Cleveland, Ohio, USA
3. Low-gravity Exploration Technology Branch, NASA Glenn Research Center, Cleveland, Ohio, USA
4. Retired, United (Raytheon) Technologies Research Center, Avon, Connecticut, USA
5. Department of Mechanical and Aerospace Engineering, University of California San Diego, La Jolla, California, USA