1. Autonomous Systems Lab, Institute of Systems Engineering, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
2. Autonomous Systems Lab, Institute of Systems Engineering, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland and DIDEL S.A. CH-1092 Belmont/Lausanne, Switzerland
3. DIDEL S.A., CH-1092 Belmont/Lausanne, Switzerland