Cotutelle de thèse between Potsdam University and St. Petersburg State University

Cooperation with Prof. Mikhail Pudovkin † and Irina Mironova, St. Petersburg State University, St. Petersburg (Russia)

Topic: Influence of solar activity on atmospheric transparency and aerosol optical properties

Duration: October 2003 - July 2006

Disputation: 14th December 2005 and 20th June 2006