摘要
本文从地质雷达正演原理着手，分析了差分格式中半空间步长与半时间步长的实现方法，同时通过分析数值频散的产生，进而推导出了理想频散关系和超吸收边界条件．最后文中还对比了有无边界条件的雷达正演模拟效果和精度．
Based upon the forward simulation principle of ground penetrating radar,this article analyzes the realizationmethod of the half grid spacing and the half time increment in difference format,at the same time analyzed the produceof the numerical frequency dispersion,then deduced the ideal frequency dispersion relationship and the super absorb-ing boundary condition.Finally,this article compares radar forward simulate effect and precision between having andwithout boundary condition.
出处
《地球物理学进展》
CSCD
2004年第4期898-902,共5页
Progress in Geophysics
基金
国家自然科学基金重大项目(50099620-03-02)资助.
关键词
地质雷达
时域有限差分法
正演模拟
ground penetrating radar
finite difference time domain method
forward simulate
