About the thesisThe basic principle of the double focal transformation is to focus seismic energy by a back-propagation of the seismic data at the source and receiver side to certain depth levels. As a result, the seismic data are represented by a limited number of samples in the focal domain in a localized area, whereas aliasing noise spreads out. By imposing a sparse solution in the focal domain, aliasing noise is suppressed and data reconstruction beyond aliasing is achieved.About the authorHannes Kutscha was born in Sondershausen, Germany in 1982. He received his diploma in Geophysics in 2008 from the Westfählische Wilhelmsuniversität Münster (University of Münster) in Germany. His specialisation was the invest igation of a geologically interesting area with reflection seismic and refraction seismic measurements. He joined the Imaging Science and Technology department of Delft University of Techology in April 2008. During his time as PhD candidate he performed research for the DELPHI Consortium under the supervision of Dr. ir. D. J. (Eric) Verschuur, who's main interests are seismic modelling, data processing and imaging techniques.