Synopsis
		sfmpifd2d rho=Frho.rsf wavelet=Fw.rsf verb=n ns= ds= s0= sz=5 nr= dr= r0= rz=sz nb=80 coef=0.003 rectx=2 rectz=2

Parameters
		float coef=0.003 absorbing boundary coefficient   float dr= receiver interval   float ds= shot interval   int nb=80 boundary width   int nr= number of receiver   int ns= shot number   float r0= receiver origin   int rectx=2 source smooothing parameter   int rectz=2 source smooothing parameter   file rho= auxiliary input file name   int rz=sz receiver depth   float s0= shot origin   int sz=5 source depth   bool verb=n [y/n] verbosity flag   file wavelet= auxiliary input file name