The main research interests of Wolfgang Wagner lie in physical modelling and geophysical parameter retrieval from remote sensing data. His scope is to develop robust algorithms, taking into account instrument specifications and application requirements. He has mainly worked with active remote sensing techniques, in particular scatterometry, Synthetic Aperture Radar (SAR) and full-waveform airborne laser scanning (lidar), although he also has experience with optical and infrared sensors. He has always sought the cooperation with scientists from other geoscientific fields (hydrology, meteorology, climatology, agriculture, etc.) in order to develop novel remote sensing applications.