1. Payloads and Space Science Department, National Institute for Aerospace Technology, Torrejón de Ardoz, Spain
2. Institute for Optoelectronics and Microtechnologies, Polytechnic University of Madrid, Madrid, Spain
3. Karlsruhe Institute of Technology, Institute of Microstructure Technology, Eggenstein-Leopoldshafen, Germany
4. Materials and Structures Department, National Institute for Aerospace Technology, Torrejón de Ardoz, Spain
5. Institute for Microelectronics and Microsystems, CNR, Catania, Italy