linux下fortran语言开发，利用射线法进行地震波的正演模拟，在linux下输入make进行编译，demo目录为例子，一共14个例子。

二维声波方程时间二阶，空间10阶交错网格正演模拟-Forward modeling of two-dimensional acoustic wave equation time order, space 10 order staggered grid

探地雷达二维正演程序，可以模拟二维复杂地形，对初学者帮助非常大。-Ground penetrating radar forward two-dimensional program that can simulate a two-dimensional complex terrain, very helpful for beginners.