1. Graduate Aerospace Laboratories; California Institute of Technology; 1200 E. California Boulevard Pasadena CA 91125 USA
2. Jet Propulsion Laboratory; California Institute of Technology; 4800 Oak Grove Drive Pasadena CA 91109 USA
3. Department of Mechanical and Process Engineering; Swiss Federal Institute of Technology (ETH); Tannenstrasse 3 Zürich 8092 Switzerland