Abstract：Research purposes: The exploration of GPR is influenced by the conditions of weather，site，economy and SO on and using FDTD to simulate the mechanism of GPR call overcome the influences，lave cost，improve exploration efficiency and data collecting quality and provide the guidance for the positive simulation of the GPR．Migration imaging is one of the most important methods of the data processing．It can set the every reflection point to the real position and obtain the actual image that could reflect the underground medium．
Research conclusions: The abnormity of pipelines is obtained from the common offset profile by making simulation for the detection of underground pipelines．The result shows that using FDTD to simulate the mechanism of GPR is feasible． The actual positions of the underground pipelines ale known by using migration imaging．The result shows that migration imaging could make the object back to the original position and obtain underground actual image with high transverse resolution．
冯彦谦，王 银，刘四新. 基于FDTD的探地雷达数值仿真与成像研究[J]. 铁道工程学报, 2009, 26(6): 17-20.
FENG Yan—qian，WANG Yin，LIU Si—xin. Research on the Numerical Simulation and Imaging of GPR Based on the FDTD. 铁道工程学报, 2009, 26(6): 17-20.
2009, Vol. 26 
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