Synopsis
		sffbrec < vinit.rsf > Fw1.rsf back=Fw2.rsf amp=1000 fm=10 dt= nt= ns=1 ng= jsx= jsz=0 jgx=1 jgz=0 sxbeg= szbeg= gxbeg= gzbeg= csdgather=y ft=0 jt=1

Note: It is used as a demonstration that we can reconstruct the modeled
wavefield exactly via boundary saving.

Parameters
		float amp=1000 maximum amplitude of ricker   file back= auxiliary output file name   bool csdgather=y [y/n] default, common shot-gather; if n, record at every point   float dt= time interval   float fm=10 dominant freq of ricker   int ft=0 first recorded time   int gxbeg= x-begining index of receivers, starting from 0   int gzbeg= z-begining index of receivers, starting from 0   int jgx=1 receiver x-axis jump interval   int jgz=0 receiver z-axis jump interval   int jsx= source x-axis jump interval   int jsz=0 source z-axis jump interval   int jt=1 time interval   int ng= total receivers in each shot   int ns=1 total shots   int nt= total modeling time steps   int sxbeg= x-begining index of sources, starting from 0   int szbeg= z-begining index of sources, starting from 0

Used In
		XJTU          gpufwi/fbrec