enter: name of output file ( < 40 char) disper.d enter: sample rate .001 enter: tmax for trace 2.0 enter: minimum frequency 1 enter: maximum frequency 150. enter: maximum mode # 9 enter: deltz step size 2. enter: number of control 3 layer( 1) enter: beta,alpha,rho,depth(top) 100, 800, 1600, 0 layer( 2) enter: beta,alpha,rho,depth(top) 100, 800, 1600, 2 layer( 3) enter: beta,alpha,rho,depth(top) 400, 2000, 1700, 2.001 twice npts= 4096 twice tmax= 4.0960 output====>disper.d