Synopsis
		sfpreconstkirch < in.rsf > out.rsf inv=n zero=n aal=y nh= dh= h0= vel=

Requires the input to be in (time,cmp x,cmp y,offset)

Parameters
		bool aal=y [y/n] if y, apply antialiasing   float dh= offset sampling   float h0= offset origin   bool inv=n [y/n] if y, modeling; if n, migration   int nh= number of offsets   float vel= velocity   bool zero=n [y/n] if y, stack in migration

Used In
		BEI          dpmv/yalei dpmv/matt krch/sep73 trimo/mod   JSG          shape/beivc   SEP          angle/agmig antial/mod antial/sig oc2/cup vc2/elfvc vc2/beivc vc2/sigvc