5 inner offset zero traces (25-29) added; source at trace 27 phone spacing 100 meters, inner offset 300 meters survey=land area=S.Amer. source=Vibroseis spread=split n1=2600 d1=.002 f1=.002 label1="Time (sec)" n2=53 d2=.100 f2=-2.600 label2="Offset (km)" n3=1 title="Oz 07" plottpow=1.143555