Synopsis
		sfmig2 < inp.rsf vel=vel.rsf > mig.rsf gather=gather.rsf offset=offset.rsf antialias=1.0 apt=nx half=y verb=y rho=1.-1./nt

The axes in the input are {time,midpoint,offset}
The axes in the offset are {1,midpoint,offset}
The axes in the output are {time,midpoint}
The axes in the "image gather" are {time,midpoint,offset}

Parameters
		float antialias=1.0 antialiasing   int apt=nx Intergral aperture   string gather= auxiliary output file name   bool half=y [y/n] if y, the third axis is half-offset instead of full offset   string offset= auxiliary input file name   float rho=1.-1./nt Leaky integration constant   file vel= auxiliary input file name   bool verb=y [y/n] verbosity flag

Used In
		RSF          usp/data