1. Department of Electrical Engineering, Pontificia Universidad Católica de Chile , Vicuña Mackenna 4860, 7820436 Santiago , Chile
2. Leibniz-Institut fúr Astrophysik Potsdam (AIP) , An der Sternwarte 16, D-14482 Potsdam , Germany
3. DICTUC S.A. , Av. Vicuña Mackenna 4860, 7820436 Santiago , Chile
4. Sky-Walkers SpA , 3240000 Litueche , Chile
5. Institut fúr Physik und Astronomie, Universitat Potsdam , Karl-Liebknecht-Strasse 24/25, D-14476 Potsdam , Germany