Data Facts

Raw Shot Gathers Broken into 200-shot increments (roughly 1.8GB apiece) in /net/koko/data/data_2d/north_sea_basalt/.
Common-midpoint gathers /net/koko/data/data_2d/north_sea_basalt/cmps.H
Velocity Model N/A
Stack N/A
Zero-offset Migration N/A
Usage (); Kostov et al. (2000)
Geometry

 
	-----------------------------------------------------------------
                 ********** cmps.H ************ 
          4 -esize          Unsynched        data_format-xdr_float 
-----------------------------------------------------------------
n1=2451                  o1=0.000000     d1=0.004000     label1=none 
n2=182400        o2=1.000000     d2=1.000000     label2=trace number 
n3=1             o3=0?           d3=1?           label3= 
n4=1             o4=0?           d4=1?           label4= 
n5=1             o5=0?           d5=1?           label5= 
n6=1             o6=0?           d6=1?           label6= 
n7=1             o7=0?           d7=1?           label7= 
n8=1             o8=0?           d8=1?           label8= 
n9=10            o9=0?           d9=1?           label9= 
Data: in=/net/koko/data/data_2d/north_sea_basalt/Data/2557-2756.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/2757-2956.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/2957-3156.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/3157-3356.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/3357-3556.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/3557-3756.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/3757-3956.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/3957-4156.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/4157-4356.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/4357-4556.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/4557-4756.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/4757-4956.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/4957-5156.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/5157-5356.shot.H@;/net/koko/data/data_2d/north_sea_basalt/Data/5357-5500.shot.H@ 
147.0% of 17882496000 bytes 
-----------------------------------------------------------------
keynumber=1      keytype=scalar_float    keyname=s_x 
keynumber=2      keytype=scalar_float    keyname=s_y 
keynumber=3      keytype=scalar_float    keyname=g_x 
keynumber=4      keytype=scalar_float    keyname=g_y 
keynumber=5      keytype=scalar_float    keyname=offset_x 
keynumber=6      keytype=scalar_float    keyname=offset_y 
keynumber=7      keytype=scalar_float    keyname=aoffset 
keynumber=8      keytype=scalar_float    keyname=cmp_x 
keynumber=9      keytype=scalar_float    keyname=cmp_y 
keynumber=10     keytype=scalar_int      keyname=data_record_number 
n2=2679306       o2=1.000000     d2=1.000000     label2=trace_number 
Headers in=/net/kana/scr2/morgan/cmps.H@@@ 
   26793060 elements,   107172240 bytes in data file 
-----------------------------------------------------------------
grid axis2       n2=4    o2=1.000000     d2=1.000000     label2=trace_in_bin 
grid axis3       n3=456          o3=185.000000   d3=25.000000    label3=aoffset 
grid axis4       n4=3160         o4=1372000.000000       d4=25.000000    label4=cmp_x 
Grid   in=/net/kana/scr2/morgan/cmps.H@@@@@ 
    5763840 elements,    23055360 bytes in data file 
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Problem Sub-basalt imaging, multiples, cable feathering.
History of Data See Kostov et al. (2000)
Preprocessing none that we know of
Proprietary Considerations Free to use in SEP publications. Must acknowledge WesternGeco.

 

coff
Figure 1 Near-offset section.

 

cmps
Figure 2 Three common-midpoint gathers.