| | \n\n \n \n \n float dv= | \tstep in velocity \n | \n \n\n \n \n \n int extend=4 | \ttrace extension \n | \n \n\n \n \n \n int mute=12 | \tmute zone \n | \n \n\n \n \n \n int nv= | \tnumber of scanned velocities \n | \n \n\n \n \n \n float smax=2.0 | \tmaximum heterogeneity \n | \n \n\n \n \n \n float smin=1.0 | \tminimum heterogeneity \n | \n \n\n \n \n \n float str=0.5 | \tmaximum stretch allowed \n | \n \n\n \n \n \n float v0= | \tfirst scanned velocity \n | \n \n |