Morphology of valley systems on Titan - a comparative study

(1) DLR, Institute of Planetary Research, Berlin, Germany, (2) Dept. of Earth Sciences, Inst. of Geosciences, Freie Universitat Berlin, Germany, (3) Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, 85721 USA, (4) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California 91109, USA, (5) U.S. Geological Survey, Denver, CO, 80225 USA, (6) Cornell University, Astronomy Department, Ithaca, NY, USA, (7) Space Department, Johns Hopkins University Applied Physics Lab, Maryland 20723-6099, USA (mirjam.langhans@dlr.de).