ACKNOWLEDGEMENTS

I would like to thank Bill Harlan for suggesting this topic to me and providing me with his code. My thanks also belong to Jon F. Claerbout for attracting my attention to some of his papers, which helped me understand better some concepts and find their applications. His inquisitive questions at seminars directed my attention to problems that I otherwise would not have noticed. I want to express my gratitude to Gilles Darche for allowing me to use his processed version of BP Alaska gather and for many helpful discussions. I am grateful to Francis Muir for supervising my work in previous quarters, which helped me a lot in my further work.