Synopsis
		sfstfchain2 < src.rsf > wht.rsf target=tgt.rsf init_w=w0.rsf init_wf=wf0.rsf fweight=fwht.rsf match=mch.rsf wsnap=snap_w.rsf wfsnap=snap_wf.rsf lsmigsnap=snap_lsmig.rsf rect1=1 rect2=1 frect1=1 frect2=1 niter=0 liter=50 snap=0

Parameters
		int frect1=1   int frect2=1 smoothing in frequency   file fweight= auxiliary output file name   file init_w= auxiliary input file name   file init_wf= auxiliary input file name   int liter=50 number of linear iterations   file lsmigsnap= auxiliary output file name   file match= auxiliary output file name   int niter=0 number of iterations   int rect1=1   int rect2=1 smoothing in time   int snap=0 interval for snapshots   file target= auxiliary input file name   file wfsnap= auxiliary output file name   file wsnap= auxiliary output file name