Synopsis
		sfTestfd2d < Fv.rsf > Fw.rsf nb=30 nt= dt= fm=20.0 ft=0 jt=1

Sponage absorbing boundary condition

Parameters
		float dt= time sampling interval   float fm=20.0 dominant freq of Ricker wavelet   int ft=0 first recorded time   int jt=1 time interval   int nb=30 thickness of sponge ABC   int nt= number of time steps

Used In
		XJTU          primer/testfd2d