GRAPHICAL USER INTERFACE (GUI) SOFTWARE DEVELOPMENT FOR 2-D GROUND-PENETRATING RADAR (GPR) FDTD MODELING AND ITS APPLICATION IN CHARACTERIZATION SUBSURFACE ANOMALY

• Main Author: RAKHMAN (NIM : 223 08 308); Pembimbing : Dr. Wahyudi W. Parnadi; Dr. Wahyu Srigutomo, AFIF
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/19821
• Institution: Institut Teknologi Bandung

The finite difference time domain (FDTD) method is widely applied in the forward modeling of ground-penetrating radar (GPR). The reason for selecting <br /> <br /> <br /> this method include ease of analysis problem based on integral equations, and accuracy to handle a variety of complex models. In this study, a graphical user interface (GUI) application of GPR FDTD modeling is created with the aim to facilitate the users. Applications written in MATLAB and is intended for continuous reflection profiling (CRP) measurement <br /> <br /> <br /> configuration. FDTD modeling using mode tranverse magnetic (TM) in two dimensions. Convolutional perfectly matched layer (CPML) was applied to prevent reflections on analysis area boundary. Scheme O(2.4) used in the partial derivative approach to more accurate analysis results. Created application are then tested with two synthetic models of metal pipe buried case. Application can clearly show the hyperbolic pattern of reflection pipe and the boundary between concrete layer and soil, also artifacts arising from the wave propagation. Furthermore, it can be observed that the noise imposed on the relative permittivity (&#949;r) parameter will cause the pattern of scattering on wave propagation. Noise in the realative permittivity (&#949;r) parameter also have a greater influence in changing the electric field strength of Ey, rather than noise parameters of conductivity (&#963;). Created applications is also used to estimate the radargram from laboratory scale real model which is a blend of two created synthetic models.