SEG C3 45 shot

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Sandia/SEG Salt Model 45 shot subset

This archive contains files from Sandia National Laboratory work on the SEG/EAEG Salt model. Sandia extracted 45 shots from the full model for tests of their "SALVO" finite difference imaging program. With permission from Sandia Laboratory, ARCO is providing a reformatted set of the shots. From the original data, we removed extraneous auxillary traces, detected and interpolated a small number of missing traces, sorted the data into "sail line" order, and wrote out a uniform set of SEGY files. Other than two interpolated traces, the data are identical to the files used in the Salvo program test.

Files included:

ARCO reformatted SEGY files
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_45Shot_shots1-9.sgy
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_45Shot_shots10-18.sgy
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_45Shot_shots19-27.sgy
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_45Shot_shots28-36.sgy
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_45Shot_shots37-45.sgy


source signature trace
https://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_45Shot_source_sig.sgy


Some velocity files are:
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_C3NA_Velocity.sgy
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_C3WA_vid_smooth_20x20x10.sgy
http://s3.amazonaws.com/open.source.geoscience/open_data/seg_eage_salt/SEG_C3WA_vrms_smooth_20x20x10.sgy

SEGY File Information:
45 shots
625 samples per trace
8 ms sample rate
201 x 201 receiver grid, dx,dy = 20 m
approx 5 x 9 source grid
nominal 960 m shot and shot-line separation (some variation)
Source and receiver coords in standard SEGY locations
Source number (1-45) and channel number (1-40401) in standard SEGY locs
Orignial Sandia file number in SEGY Original Record Number
Non-standard values set:
Shot number in bytes 1-4, receiver line number (1-201) in bytes 5-8

ls -l shot*.segy
-rw-rw-r-- 1 cmosher apse_dev 996292260 Nov 16 09:07 shots1-9.segy
-rw-rw-r-- 1 cmosher apse_dev 996292260 Nov 16 09:18 shots10-18.segy
-rw-rw-r-- 1 cmosher apse_dev 996292260 Nov 16 09:17 shots19-27.segy
-rw-rw-r-- 1 cmosher apse_dev 996292260 Nov 16 09:18 shots28-36.segy
-rw-rw-r-- 1 cmosher apse_dev 996292260 Nov 16 09:18 shots37-45.segy

The following is a list of the source and receiver XYZ locations for channel 1 on each of the 45 shots. 

    sou_x     sou_y     sou_z     rec_x     rec_y     rec_z
   4820.0    2620.0      20.0    2820.0    4620.0      20.0
   4820.0    3580.0      20.0    2820.0    5620.0      20.0
   4820.0    4540.0      20.0    6820.0    6620.0      20.0
   4820.0    5500.0      20.0    2820.0    7620.0      20.0
   4820.0    6460.0      20.0    2820.0    8620.0      20.0
   4820.0    7740.0      20.0    2820.0    9620.0      20.0
   4820.0    8700.0      20.0    6820.0   10700.0      20.0
   4820.0    9660.0      20.0    2820.0   11620.0      20.0
   4820.0   10620.0      20.0    2820.0   12620.0      20.0
   5780.0    2620.0      20.0    3780.0    4620.0      20.0
   5780.0    3580.0      20.0    3780.0    5620.0      20.0
   5780.0    4540.0      20.0    3780.0    6620.0      20.0
   5780.0    5500.0      20.0    3780.0    7620.0      20.0
   5780.0    6460.0      20.0    3780.0    8620.0      20.0
   5780.0    7740.0      20.0    3780.0    9620.0      20.0
   5780.0    8700.0      20.0    3780.0   10620.0      20.0
   5780.0    9660.0      20.0    3780.0   11620.0      20.0
   5780.0   10620.0      20.0    3780.0   12620.0      20.0
   6740.0    2620.0      20.0    4820.0    4620.0      20.0
   6740.0    3580.0      20.0    4740.0    5660.0      20.0
   6740.0    4540.0      20.0    8820.0    6620.0      20.0
   6740.0    5500.0      20.0    4740.0    7660.0      20.0
   6740.0    6460.0      20.0    4820.0    8620.0      20.0
   6740.0    7740.0      20.0    4740.0    9660.0      20.0
   6740.0    8700.0      20.0    8820.0   10700.0      20.0
   6740.0    9660.0      20.0    4740.0   11660.0      20.0
   6740.0   10620.0      20.0    4820.0   12620.0      20.0
   7700.0    2620.0      20.0    5780.0    4620.0      20.0
   7700.0    3580.0      20.0    5700.0    5620.0      20.0
   7700.0    4620.0      20.0    5780.0    6620.0      20.0
   7700.0    5580.0      20.0    5700.0    7620.0      20.0
   7700.0    6620.0      20.0    5780.0    8620.0      20.0
   7700.0    7580.0      20.0    5700.0    9620.0      20.0
   7700.0    8620.0      20.0    5780.0   10620.0      20.0
   7700.0    9580.0      20.0    5700.0   11620.0      20.0
   7700.0   10620.0      20.0    5780.0   12620.0      20.0
   8660.0    2620.0      20.0    6820.0    4620.0      20.0
   8660.0    3580.0      20.0    6660.0    5660.0      20.0
   8660.0    4540.0      20.0   10660.0    6620.0      20.0
   8660.0    5500.0      20.0    6660.0    7660.0      20.0
   8660.0    6460.0      20.0    6820.0    8620.0      20.0
   8660.0    7740.0      20.0    6660.0    9660.0      20.0
   8660.0    8700.0      20.0   10660.0   10700.0      20.0
   8660.0    9660.0      20.0    6660.0   11660.0      20.0
   8660.0   10620.0      20.0    6820.0   12620.0      20.0

For more information, email Chuck Mosher.

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