phone spacing 25 meters, inner offset 200 meters
Data had variable geophone spacing: dx=25 meters for traces 1-64 and
50 meters for traces 64-92.  Zero traces were added between outer
traces to create even 25 meters spacing, raising nuber of traces to 119
survey=marine area=Canada source=Airgun spread=offend
n1=1791 d1=.004 f1=.004 label1="Time (sec)" 
n2=119 d2=.025 f2=.200 label2="Offset (km)"  
n3=1 
title="Oz 27" 
plottpow=2.568359