Determination of geometrical spreading from traveltimes |
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| Authors: | Claudia Vanelle Dirk Gajewski |
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| Institution: | Institute of Geophysics, University of Hamburg, Bundesstr. 55, 20146, Hamburg, Germany |
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| Abstract: | Geometrical spreading plays an important role for amplitude preserving migration, which is a very time-consuming process. In order to achieve efficiency in terms of computational time and, particularly, storage space, we propose a method to determine geometrical spreading from coarsely gridded traveltime tables. The method is based on a hyperbolic traveltime expansion and provides also a fast and accurate algorithm for the interpolation of traveltimes, including the interpolation of complete shots. Examples demonstrate the applicability of the method to isotropic and anisotropic media. |
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| Keywords: | Geometrical spreading Anisotropy Traveltime interpolation Amplitude preserving migration |
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