Synopsis
		sfmpirfwigrad Fvel=Fv.rsf Fd=Fd.rsf Fd0=Fd0.rsf Fwavelet=Fw.rsf Fadj=Fadj.rsf Fgrad=Fgrad.rsf ns= ds= s0= sz=3 nr=nx dr=dx r0=x0 rz=3 verb=n frectx=2 frectz=2 nb=20 coef=5. interval=1 acqui_type=1

Parameters
		file Fadj= auxiliary input file name   file Fd= auxiliary input file name   file Fd0= auxiliary input file name   file Fgrad= auxiliary output file name   file Fvel= auxiliary input file name   file Fwavelet= auxiliary input file name   int acqui_type=1 acquisition type   float coef=5. maximum velocity of the medium   float dr=dx receiver interval   float ds= shot interval   int frectx=2 source smoothing in x   int frectz=2 source smoothing in z   int interval=1 wavefield storing interval   int nb=20 PML boundary width   int nr=nx number of receiver   int ns= shot number   float r0=x0 receiver origin   int rz=3 receiver depth   float s0= shot origin   int sz=3 source depth   bool verb=n [y/n] verbosity flag