Synopsis
		sflsdmo < in.rsf > out.rsf mint=2 n=32 niter=5 inv=n type=1 h= half=y velhalf=0.75

Parameters
		float h=   bool half=y [y/n] if y, the third axis is half-offset instead of full offset   bool inv=n [y/n] inversion flag   int mint=2 starting time sample   int n=32 number of offset samples   int niter=5 iterative number   int type=1 type of amplitude (0,1,2,3)   float velhalf=0.75 half-velocity