Synopsis
		sflrvc0 vel=vel.rsf < fft.rsf left=left.rsf > right.rsf seed=time(NULL tol=1.e-4 npk=20 v0=0.0 fmin=dw tmax=t0+(nt-1

Parameters
		fmin=dw minimum frequency   file left= auxiliary output file name   npk=20 maximum rank   seed=time(NULL   tmax=t0+(nt-1   tol=1.e-4 tolerance   v0=0.0 minimum velocity   file vel= auxiliary input file name