1. Institute of Experimental Physics I, Justus Liebig University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
2. Institute of Theoretical Physics, Justus Liebig University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
3. Department of Electrical Engineering, University of Applied Sciences, Wiesenstr. 14, 35390 Giessen, Germany
4. ONERA, Palaiseau 91120, France
5. Institute of Experimental Physics II, Justus Liebig University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
6. German Aerospace Center, Institute of Aerodynamics and Flow Technology, Spacecraft Department, Bunsenstrasse 10, 37073 Goettingen, Germany