Synopsis
		sfwexwfl slo=Fs.rsf < Fd.rsf > Fw.rsf verb=n eps=0.01 datum=0 inv=1 causal=n nrmax=1 dtmax=0.004 pmx=0 pmy=0 tmx=0 tmy=0

Parameters
		bool causal=n [y/n] causality flag   int datum=0 datuming flag   float dtmax=0.004 max time error   float eps=0.01 stability parameter   int inv=1 down/upward flag   int nrmax=1 maximum references   int pmx=0 padding on x   int pmy=0 padding on y   file slo= auxiliary input file name   int tmx=0 taper on x   int tmy=0 taper on y   bool verb=n [y/n] verbosity flag