Title of article :
Tomographic inversion of ocean bottom seismograph (OBS) data: Problems and solutions applied to the NW Svalbard Hydratech data set
Author/Authors :
Rossi، نويسنده , , Giuliana and Bِhm، نويسنده , , Gualtiero and Madrussani، نويسنده , , Gianni، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2011
Abstract :
The paper is aimed at discussing some problems that may arise in the tomographic inversion of data acquired with particular geometries, as vertical seismic profiles (VSP) or implying the use of Ocean Bottom Seismographs (OBS), and presenting the solutions used to solve them. One problem is due to the limited number of sensors (that may be even a single one) and of their sparseness. This affects the information distribution that is concentrated in the vicinity of each sensor. This fact, together with the second problem, i.e. the strong asymmetry of the ray path, may decrease the reliability of the inversion.
ocedures for irregular adaptive gridding of the reflecting interfaces and single ray datuming are proposed as possible solutions to overcome these obstacles, while obtaining a reliable and highly resolved velocity model in depth: the relative procedures are tested through synthetic models and on real data.
Keywords :
tomography , OBS , Datuming , Irregular adaptive gridding , Reflector geometry
Journal title :
Computers & Geosciences
Journal title :
Computers & Geosciences