Rauch, T. (Eberhard Karls Universitat Tuebingen Tuebingen, Germany)
Quinet, P. (Mons Univ. Belgium)
Hoyer, D. (Eberhard Karls Universitat Tuebingen Tuebingen, Germany)
Werner, K. (Eberhard Karls Universitat Tuebingen Tuebingen, Germany)
Richter, P. (Potsdam Univ. Potsdam, Germany)
Kruk, J. W. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Demleitner, M. (Heidelberg Univ. Heidelberg, Germany)