Title :
3D PML-FDTD simulation of ground penetrating radar on dispersive Earth media
Author :
Teixeira, F.L. ; Chew, W.C. ; Straka, M. ; Oristaglio, M.L. ; Wang, T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Illinois Univ., Urbana, IL, USA
Abstract :
A 3D finite-difference time-domain simulation of ground penetrating radar (GPR) is described. The soil material is characterized by inhomogeneities, conductive loss and strong dispersion. The dispersion is modelled by an N-th order Lorentz model and implemented by recursive convolution. The perfectly matched layer (PML) is used as an absorbing boundary condition (ABC). This formulation facilitates the parallelization of the code. A code is written for a 32 processor system. Almost linear speedup is observed. Results include the radargrams of buried objects
Keywords :
finite difference time-domain analysis; geophysical techniques; radar applications; radar detection; radar theory; remote sensing by radar; soil; terrestrial electricity; N-th order Lorentz model; absorbing boundary condition; buried object detection; conductive loss; dispersive media; finite-difference time-domain; geoelectric method; geology; geophysical measurement technique; ground penetrating radar; inhomogeneities; parallel computing; parallelization; perfectly matched layer; radar remote sensing; radargram; recursive convolution; soil; strong dispersion; terrestrial electricity; three dimensional simulation; Boundary conditions; Buried object detection; Conducting materials; Convolution; Dispersion; Finite difference methods; Ground penetrating radar; Perfectly matched layers; Soil; Time domain analysis;
Conference_Titel :
Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International
Print_ISBN :
0-7803-3836-7
DOI :
10.1109/IGARSS.1997.615305
