Ray Tracing of CMP Antenna Array GPR System
There is much interest in vehicle mounted array GPR systems for landmine detection and work is being carried out on various national, because high speed array GPR systems can sweep a large area in a relatively short time to improve performance and efficiency. We developed the vehicle mounted stepped-frequency (SF) CMP antenna array GPR system. The system has three pairs of Vivaldi antennas that configure a symmetrical CMP antenna array. Based on this configuration, multi-offset CMP data gather can be acquired at every measurement position. Migration is an important signal processing method that can improve signal-clutter ratio and reconstruct subsurface image. Diffraction stacking migration and Kirchhoff migration sum amplitudes along the migration trajectory that generally is hyperbolic. But when the ground surface varies acutely, we have to modify the migration trajectory by the technique of ray tracing. We compute the travel time between transmitter, receiver and each subsurface scattering point, and search the propagation ray depending on the Fermats principle. The method is tested by an experiment data acquired by the SF CMP antenna array GPR system. The target is a metal ball that is buried under a sand mound. A nice result of ray tracing is shown in the case.
Xuan Feng Motoyuki Sato Cai Liu
College of Geo-Exploration Science and Technology,Jilin University No.6 Xi Minzhu Street,Changchun 1 Center for Northeast Asian Studies,Tohoku University 41 Kawauchi,Aob-ku,Sendai 980-8576,Japan
国际会议
Progress in Electromagnetics Research Symposium 2009(2009年电磁学研究新进展学术研讨会)(PIERS 2009)
北京
英文
1563-1566
2009-03-23（万方平台首次上网日期，不代表论文的发表时间）