The application of the improved linear transformation of the finite difference reverse-time migration in the GPR date processing
Focused on the GPR(Ground Penetrating Radar)migration problem of steep-dip reflection and the extrapolation in laterally inhomogeneous media, to which conventional GPR migration method is difficult to adapt, which is always the focal point of the GPR data processing, the paper introduce the linear transformation of the finite difference migration, which is proposed by Zhiming Li in his doctor thesis and is essentially different from the Cartesian coordinates or the time-retarded coordinates, through a more accurate and stable computation, a no approximate equation is obtained in constant-velocity media, with the essentially different difference grid and boundary conditions,to achieve steep-dip reflection migration, then the paper extends the application to a variable-velocity geoelectric model to improve the former algorithm, with a errors factor added, the improved method is applied to a more complicated variable-velocity model, the migration imaging results shows the advantage of the improved linear transformation of the migration algorithm, which is more flexible in dealing with the geological problem with the main reflector and multiple reflection particles both exist.
GPR linear transformation finite difference reverse-time migration media with variable velocity
Wenbin Zhou Deshan Feng Bin Zhang Depeng Chen
School of Info-Physics and Geomatics Engineering, Central South University,Changsha,410083, China School of Info-Physics and Geomatics Engineering,Central South University, Changsha, 410083, China School of Info-Physics and Geomatics Engineering, Central South University, Changsha, 410083, China
国际会议
成都
英文
618-624
2010-06-14（万方平台首次上网日期，不代表论文的发表时间）